{"title":"SKX013 Diver 38 [Ultra Thin Edition]","description":"\u003c!-- SKX013 DIVER 38 — COLLECTION DESCRIPTION HTML — 2026-05-17\n     Scoped .la-skd — mirrors .la-utc \/ .la-skn design system.\n     EVERGREEN ONLY — no pre-order, discount, or ship-date copy.\n     NO \u003ch1\u003e in body — theme injects H1 from collection title.\n     FAQ lives in a SEPARATE custom-HTML theme block. --\u003e\n\u003cstyle\u003e\n.la-skd { font-family: inherit; color: #263238; margin: 0 auto; padding: 0; background: transparent; }\n.la-skd__banner { margin: 0 0 12px; }\n.la-skd__banner img { width: 100%; height: auto; display: block; border-radius: 4px; }\n.la-skd__figcap { font-style: italic; color: #5a6166; font-size: 0.9rem; line-height: 1.6; margin: 0 0 32px; }\n.la-skd__intro { margin-bottom: 8px; }\n.la-skd__intro p { font-size: 1.05rem; line-height: 1.65; color: #3a4045; margin: 0 0 16px; }\n.la-skd__intro strong { color: #263238; }\n.la-skd__section-header { font-size: 1.75rem; font-weight: 400; letter-spacing: 0.02em; color: #263238; margin: 56px 0 24px; }\n.la-skd__prose p { font-size: 1rem; line-height: 1.65; color: #3a4045; margin: 0 0 14px; }\n.la-skd__prose strong { color: #263238; }\n.la-skd__chooser { list-style: none; padding: 0; margin: 0 0 24px; display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 12px; }\n.la-skd__chooser li { background: #F5F5F0; border-radius: 8px; padding: 18px 20px; font-size: 0.95rem; line-height: 1.55; color: #3a4045; }\n.la-skd__chooser li strong { display: block; color: #263238; margin-bottom: 6px; font-weight: 600; font-size: 1rem; }\n.la-skd__table-wrap { overflow-x: auto; margin: 0 0 16px; }\n.la-skd__table { width: 100%; border-collapse: collapse; font-size: 0.95rem; }\n.la-skd__table thead th { background: #263238; color: #F5F5F0; padding: 14px 16px; text-align: left; font-weight: 500; font-size: 0.9rem; letter-spacing: 0.02em; }\n.la-skd__table tbody td { padding: 14px 16px; color: #3a4045; }\n.la-skd__table tbody tr:nth-child(odd) { background: #FAFAF7; }\n.la-skd__table tbody tr:nth-child(even) { background: #F5F5F0; }\n.la-skd__table tbody td strong { color: #263238; }\n.la-skd__caption { font-style: italic; color: #5a6166; font-size: 0.9rem; line-height: 1.6; margin: 0 0 32px; }\n.la-skd__closer { margin: 40px 0 0; font-size: 1.05rem; line-height: 1.6; color: #3a4045; font-style: italic; text-align: center; }\n@media (max-width: 768px) { .la-skd__chooser { grid-template-columns: 1fr; } }\n\u003c\/style\u003e\n\n\u003cdiv class=\"la-skd\"\u003e\n\n  \u003cdiv class=\"la-skd__banner\"\u003e\n    \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0012\/0386\/3612\/files\/skx013-diver-38-thinness-comparison-1600x600-text.jpg?v=1778229374\" alt=\"SKX013 thinness comparison — modded Seiko SKX013 at 14.5mm vs Lucius Atelier SKX013 Diver 38 Ultra Thin Edition at 10.86mm\"\u003e\n  \u003c\/div\u003e\n  \u003cp class=\"la-skd__figcap\"\u003eSame 38mm diameter. A stock SKX013 modded to 14.5mm versus the SKX013 Diver 38 at 10.86mm — roughly 25% thinner.\u003c\/p\u003e\n\n  \u003cdiv class=\"la-skd__intro\"\u003e\n    \u003cp\u003eThe \u003cstrong\u003eSKX013 Diver 38\u003c\/strong\u003e is our ground-up reinterpretation of the dive-watch icon — engineered to be among the thinnest NH-compatible dive cases on the market today. \u003cstrong\u003e10.86mm\u003c\/strong\u003e with the Ultra Thin solid caseback. A 38mm case that wears 40 with the crown guards. The dimensions of a daily driver, the lineage of a tool watch.\u003c\/p\u003e\n    \u003cp\u003eHere's the thing about thinness in a dive case: it usually goes the wrong way. The original Seiko SKX013 measures 13mm — and a typical mod build, with its aftermarket bezel, insert and crystal, pushes that to around 14.5mm. Modding a diver almost always makes it \u003cem\u003ethicker\u003c\/em\u003e. We went the other direction. The SKX013 Diver 38 lands at 10.86mm — thinner than the original it takes its name from.\u003c\/p\u003e\n    \u003cp\u003eGetting there meant rebuilding the case body from scratch. Every internal dimension was re-engineered to compress height without compromising structure — which is why the bezel and ceramic insert are dimensionally exclusive to this case, and why we ship them pre-fitted and pre-aligned at our Singapore workshop. No fitting the rotating bezel yourself, no sticking and aligning the ceramic insert, no crystal-pressing the sapphire. For a dive build, that's the hardest, most finicky workshop time — done for you.\u003c\/p\u003e\n    \u003cp\u003eWhat we kept open is what modders actually want flexibility on: SKX-style crowns, SKX013-spec chapter rings, 28.5mm Seiko Mod dials, hands, and the NH35 \/ NH36 \/ NH38 \/ NH70 \/ NH71 \/ NH72 movements (Type M). The thinnest dive-style profile we could engineer, paired with the modding ecosystem you already know.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003ch2 class=\"la-skd__section-header\"\u003eBlack or green — which is right for you?\u003c\/h2\u003e\n  \u003cp class=\"la-skd__prose\"\u003eSame case, same engineering, same build options. The ceramic insert is the only difference — and it sets the whole character of the watch.\u003c\/p\u003e\n  \u003cul class=\"la-skd__chooser\"\u003e\n    \u003cli\u003e\n      \u003cstrong\u003eBlack Ceramic Insert\u003c\/strong\u003e\n      The original dive-watch language. Versatile, formal, timeless — it pairs with any dial and reads correctly with a suit or a t-shirt. The safe-but-never-boring choice, and the one most builds start from.\n    \u003c\/li\u003e\n    \u003cli\u003e\n      \u003cstrong\u003eGreen Ceramic Insert\u003c\/strong\u003e\n      The modern tool-watch flex. Bolder on the wrist and harder to ignore — green is the colourway that gets the \"what is that?\" question. Choose it when you want the build to stand out.\n    \u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch2 class=\"la-skd__section-header\"\u003eConfigure your build\u003c\/h2\u003e\n  \u003cp class=\"la-skd__prose\"\u003eBoth colourways ship with the same options: three casebacks and two crystal choices. This is where you decide how the watch actually wears.\u003c\/p\u003e\n  \u003cp class=\"la-skd__prose\"\u003e\u003cstrong\u003eThe caseback\u003c\/strong\u003e sets your thickness and water resistance:\u003c\/p\u003e\n  \u003cdiv class=\"la-skd__table-wrap\"\u003e\n    \u003ctable class=\"la-skd__table\"\u003e\n      \u003cthead\u003e\n        \u003ctr\u003e\n          \u003cth\u003eCaseback\u003c\/th\u003e\n          \u003cth\u003eTotal thickness\u003c\/th\u003e\n          \u003cth\u003eWater resistance\u003c\/th\u003e\n          \u003cth\u003eBest for\u003c\/th\u003e\n        \u003c\/tr\u003e\n      \u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n          \u003ctd\u003e\u003cstrong\u003eUltra Thin Solid\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd\u003e10.86mm\u003c\/td\u003e\n          \u003ctd\u003e100m \/ 10 ATM\u003c\/td\u003e\n          \u003ctd\u003eDaily wear — the thinnest profile, the headline build\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003e\u003cstrong\u003eThick Solid\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd\u003e11.36mm\u003c\/td\u003e\n          \u003ctd\u003e200m \/ 20 ATM\u003c\/td\u003e\n          \u003ctd\u003eModders who actually take it diving\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003e\u003cstrong\u003eSapphire\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd\u003e11.76mm\u003c\/td\u003e\n          \u003ctd\u003e100m \/ 10 ATM\u003c\/td\u003e\n          \u003ctd\u003eMovement display — show off the rotor\u003c\/td\u003e\n        \u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n  \u003cp class=\"la-skd__caption\"\u003eThe Ultra Thin Solid caseback is the headline build — the case at its slimmest. The other two trade a little height for a full 200m dive rating or a view of the movement.\u003c\/p\u003e\n  \u003cp class=\"la-skd__prose\"\u003e\u003cstrong\u003eThe crystal\u003c\/strong\u003e is a simpler choice — cyclops or no-cyclops — but it depends on your movement. The cyclops is a magnifier lens fused over the date window at 3 o'clock, so it only makes sense with an \u003cstrong\u003eNH35\u003c\/strong\u003e (the date movement). NH36 is day+date, NH38 has no date, and the NH70\/71\/72 are skeletonized — for any of those, or simply for a cleaner crystal, choose no-cyclops.\u003c\/p\u003e\n\n  \u003ch2 class=\"la-skd__section-header\"\u003eWhat's in the box, what you'll add\u003c\/h2\u003e\n  \u003cp class=\"la-skd__prose\"\u003e\u003cstrong\u003eIn the box:\u003c\/strong\u003e the case body with pre-installed sapphire crystal (cyclops or no-cyclops, per your selection), the bezel and ceramic insert pre-fitted and pre-aligned with a Swiss Super-LumiNova® BGW9 Grade A lume pip, and your chosen caseback.\u003c\/p\u003e\n  \u003cp class=\"la-skd__prose\"\u003e\u003cstrong\u003eYou'll add\u003c\/strong\u003e to complete the watch: an SKX013-spec chapter ring (required — it seats the dial at the correct height), a crown (five SKX-style options), a 28.5mm dial, hands, and an NH movement. New to this? Our \u003ca href=\"https:\/\/luciusatelier.com\/blogs\/news\/seiko-watch-modding-101\" target=\"_blank\" rel=\"noopener\"\u003ecomplete build guide \u003cspan class=\"glyphicon glyphicon-new-window\"\u003e\u003c\/span\u003e\u003c\/a\u003e walks through every step.\u003c\/p\u003e\n\n  \u003ch2 class=\"la-skd__section-header\"\u003eMovement \u0026amp; compatibility\u003c\/h2\u003e\n  \u003cp class=\"la-skd__prose\"\u003e\u003cstrong\u003eMovements.\u003c\/strong\u003e The case fits \u003cstrong\u003eType M\u003c\/strong\u003e versions of the NH35, NH36, NH38, NH70, NH71 and NH72. Because the Ultra Thin profile leaves very tight clearance between the hands and the sapphire, Type L movements will not fit — confirm your movement type before ordering. The SKX013 Diver 38 is recommended for experienced modders.\u003c\/p\u003e\n  \u003cp class=\"la-skd__prose\"\u003e\u003cstrong\u003eDials \u0026amp; hands.\u003c\/strong\u003e Takes 28.5mm dials — the standard shared across the entire Lucius Atelier line — and NH-compatible hands. Stock SKX007 dials may seat differently, as the original SKX007 has a 4 o'clock crown position with offset dial feet while this case is designed for 3 o'clock dial feet.\u003c\/p\u003e\n  \u003cp class=\"la-skd__prose\"\u003e\u003cstrong\u003eBezel \u0026amp; insert.\u003c\/strong\u003e Dimensionally exclusive to this case. Standard SKX bezels and inserts will not fit, and ours will not fit a stock SKX. They ship pre-fitted; replacement parts come from us.\u003c\/p\u003e\n\n  \u003cp class=\"la-skd__closer\"\u003eThe dive silhouette that defined an era — finally thinner than the original, and ready to build.\u003c\/p\u003e\n\n\u003c\/div\u003e\n\u003cbr\u003e\u003cbr\u003e","products":[{"product_id":"skx013-diver-38-black-ultra-thin-edition","title":"SKX013 Diver 38 Black — Ultra Thin Watch Case","description":"\u003ctable width=\"100%\" style=\"background-color: #1a1a1a; text-align: center;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px;\"\u003e\n\u003cspan style=\"color: #ffd006;\"\u003e\u003cstrong\u003e\u003cspan class=\"glyphicon glyphicon-time\"\u003e\u003c\/span\u003e EARLY ACCESS — FIRST PRODUCTION RUN\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"color: #ffffff; font-size: 13px;\"\u003e\u003cem\u003eTargeting 15 July 2026 ship date · 30% off · No repeat after launch\u003c\/em\u003e\u003c\/span\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c!-- split --\u003e\n\u003cp style=\"margin:0; padding:0; line-height:0;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0012\/0386\/3612\/files\/skx013-diver-38-black-mop-beach-1-1600x600.jpg?v=1778211235\" alt=\"SKX013 Diver 38 Black Ultra Thin on white sand beach with turquoise ocean\" style=\"display:block; width:100%; height:auto; margin:0; padding:0; vertical-align:bottom;\"\u003e\u003c\/p\u003e\n\u003cdiv class=\"row\" style=\"background-color: #faf7f2; padding: 32px; margin-top: 0;\"\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cem\u003e\u003cstrong\u003eThe Sub Silhouette. Reborn Ultra Thin. Ready to Build.\u003c\/strong\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eInspired by the dive-watch silhouette that defined an era, the \u003cstrong\u003eSKX013 Diver 38\u003c\/strong\u003e, part of our Ultra Thin Edition series, is our ground-up reinterpretation — engineered to be among the \u003cstrong\u003ethinnest dive cases compatible with the NH movement\u003c\/strong\u003e on the market today.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eAchieving this profile meant rebuilding the case body from scratch. Every internal dimension was re-engineered to compress the case height without compromising structure. As a consequence, the \u003cstrong\u003ebezel and ceramic insert are unique to this case\u003c\/strong\u003e — standard SKX bezels and inserts will not fit, and ours will not fit a stock SKX. Bezel and insert are pre-fitted and aligned at our workshop. They can be removed by a watchmaker, but the design and parts are exclusive to us.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eWhat we did keep compatible: the things modders actually want flexibility on. \u003cstrong\u003eSKX-style crowns, SKX013-spec chapter ring, Seiko Mod dials (28.5mm), hands, and NH-series movements\u003c\/strong\u003e all work as expected. You get the thinnest dive-style profile on the market, paired with the modding ecosystem you already know.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center; margin-top: 20px; padding-top: 18px; border-top: 1px dashed #999;\"\u003e\u003cem\u003e\u003cstrong style=\"color: #0abab5;\"\u003eRoughly 10% cheaper than building it part-by-part — and ready to assemble.\u003c\/strong\u003e\u003cbr\u003eBuying our SKX-style case body, matching bezel, ceramic insert, and sapphire crystal separately would cost about 10% more than buying parts separately. And you skip the hardest parts of the build: \u003cstrong\u003eno crystal-pressing the sapphire, no fitting the rotating bezel, no sticking and aligning the ceramic insert.\u003c\/strong\u003e We ship it pre-fitted and pre-aligned. For a dive-style build with a rotating ceramic bezel, that's hours of finicky workshop time avoided.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e\u003cdiv class=\"row\"\u003e\n\u003cdiv class=\"eight columns alpha\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #0abab5;\"\u003eWears 38, looks bigger.\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cem\u003eCase diameter 38mm. With crown guards the case width reaches 40mm. Lug-to-lug 46mm, lug width 20mm. A diver's silhouette on a small-wrist canvas. \u003ca href=\"\/blogs\/news\/38mm-watch-looks-smaller-case-proportion-guide\" title=\"Why this 38mm case wears bigger — measured against the SKX007\" target=\"_blank\"\u003eSee how we measured it against a 42.5mm SKX007 \u003cspan class=\"glyphicon glyphicon-new-window\"\u003e\u003c\/span\u003e\u003c\/a\u003e.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #0abab5;\"\u003eGenuinely thin.\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cem\u003e10.86mm with the Ultra Thin solid caseback — one of the thinnest NH-compatible dive cases ever made. The NH movement alone is 7.59mm. That leaves just a few millimeters for the crystal, walls, and hand clearance. Tight engineering.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"eight columns omega\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #0abab5;\"\u003eBuilt to dive (when you choose to).\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cem\u003eUp to 200m water resistance. Screw-down crown. Unidirectional 120-click rotating bezel with \u003cstrong\u003eblack ceramic insert\u003c\/strong\u003e and \u003cstrong\u003eSwiss Super-LumiNova® BGW9 Grade A\u003c\/strong\u003e lume pip. Bezel and insert ship pre-fitted and pre-aligned.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #0abab5;\"\u003eThree casebacks, two crystals.\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cem\u003ePick the Ultra Thin solid caseback for the headline thinness. Pick the thicker solid caseback for full 200m dive-rating. Pick the \u003cstrong\u003esapphire caseback to display the movement\u003c\/strong\u003e — and consider adding a \u003cstrong\u003edecorated bridge and rotor\u003c\/strong\u003e for a fully customised view through the back. Cyclops crystal pairs with NH35 only — the magnifier sits over the date window, so the dial must have one.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"row\"\u003e\n\u003ctable width=\"100%\" style=\"border-collapse: collapse; margin-top: 10px;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background-color: #1a1a1a; color: #ffffff;\"\u003e\n\u003cth style=\"padding: 12px; text-align: left;\"\u003eCaseback\u003c\/th\u003e\n\u003cth style=\"padding: 12px; text-align: center;\"\u003eTotal Thickness\u003c\/th\u003e\n\u003cth style=\"padding: 12px; text-align: center;\"\u003eWater Resistance\u003c\/th\u003e\n\u003cth style=\"padding: 12px; text-align: left;\"\u003eBest for\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background-color: #f0fafa; border-left: 4px solid #0abab5;\"\u003e\n\u003ctd style=\"padding: 12px;\"\u003e\n\u003cstrong\u003eUltra Thin Solid\u003c\/strong\u003e \u003cspan style=\"color: #0abab5; font-size: 11px; font-weight: bold;\"\u003e · HEADLINE BUILD\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; text-align: center;\"\u003e\u003cstrong\u003e10.86mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; text-align: center;\"\u003e100m \/ 10 ATM\u003c\/td\u003e\n\u003ctd style=\"padding: 12px;\"\u003eDaily wear — the thinnest profile\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e5e5e5;\"\u003e\n\u003ctd style=\"padding: 12px;\"\u003e\u003cstrong\u003eThick Solid\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; text-align: center;\"\u003e11.36mm\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; text-align: center;\"\u003e\u003cstrong\u003e200m \/ 20 ATM\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 12px;\"\u003eModders who actually take it diving\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e5e5e5;\"\u003e\n\u003ctd style=\"padding: 12px;\"\u003e\u003cstrong\u003eSapphire\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; text-align: center;\"\u003e11.76mm\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; text-align: center;\"\u003e100m \/ 10 ATM\u003c\/td\u003e\n\u003ctd style=\"padding: 12px;\"\u003eMovement display — show off the rotor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp style=\"margin-top: 12px; font-size: 13px; color: #555;\"\u003e\u003cem\u003eThe Ultra Thin Solid caseback is the headline build — this is the case at its slimmest. The other two are for buyers prioritising dive-rating or movement display, and add slight thickness in exchange.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"row\" style=\"background-color: #f4f4f4; padding: 20px; border-left: 4px solid #0abab5; margin-top: 20px;\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan class=\"glyphicon glyphicon-info-sign\"\u003e\u003c\/span\u003e Heads up — sold separately\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"font-size: 14px; margin-bottom: 10px;\"\u003e\u003cem\u003e\u003cstrong\u003eCrown.\u003c\/strong\u003e The crown shown in product photos is for visual reference only. Crowns must be selected above — choose from 5 SKX013-compatible options. \u003ca href=\"\/collections\/crowns-for-skx013-diver-38\" title=\"SKX013-compatible crowns\" target=\"_blank\"\u003eBrowse compatible crowns \u003cspan class=\"glyphicon glyphicon-new-window\"\u003e\u003c\/span\u003e\u003c\/a\u003e.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp style=\"font-size: 14px; margin-bottom: 0;\"\u003e\u003cem\u003e\u003cstrong\u003eChapter ring.\u003c\/strong\u003e This case requires a \u003cstrong\u003eSKX013-spec chapter ring\u003c\/strong\u003e to seat the dial correctly — without it, the dial sits too low and hands won't clear. The case \u003cstrong\u003efits both normal and ultra thin chapter rings\u003c\/strong\u003e; the choice depends on your \u003cstrong\u003edial\u003c\/strong\u003e, not the case. If your dial has applied (raised) indices, choose ultra thin for clearance. If flat-printed, either works. \u003cstrong\u003eWhen in doubt, ultra thin is the safer default.\u003c\/strong\u003e \u003ca href=\"\/collections\/chapter-rings-swiss-quality-seiko-mod-parts\/skx013?sort_by=title-ascending\" title=\"SKX013-compatible chapter rings\" target=\"_blank\"\u003eBrowse compatible chapter rings \u003cspan class=\"glyphicon glyphicon-new-window\"\u003e\u003c\/span\u003e\u003c\/a\u003e.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"row\" style=\"background-color: #fff5f5; padding: 18px; border-left: 4px solid #ff2a00; margin-top: 12px;\"\u003e\n\u003cp\u003e\u003cstrong style=\"color: #ff2a00;\"\u003e\u003cspan class=\"glyphicon glyphicon-warning-sign\"\u003e\u003c\/span\u003e For experienced modders only — TYPE M movements only\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"font-size: 14px; margin-bottom: 0; color: #7a1f1f;\"\u003e\u003cem\u003eThis case fits \u003cstrong\u003eTYPE M\u003c\/strong\u003e versions of NH35, NH36, NH38, NH70, NH71, NH72 only. \u003cstrong\u003eTYPE L will NOT fit.\u003c\/strong\u003e Due to tight clearance between hands and sapphire, this case is recommended only for professional watchmakers and experienced modders.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!--Start tab labels--\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli\u003e\u003ca class=\"active\" href=\"#tab1\"\u003eSpecs\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"#tab2\"\u003eBuild Guide\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"#tab3\"\u003eWhat's Included\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"#tab5\"\u003eHow To Mod\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!--Start tab content--\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli style=\"list-style-type: none;\" class=\"active\" id=\"tab1\"\u003e\n\u003cp\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli type=\"disc\"\u003e\n\u003cstrong\u003eCase Diameter\u003c\/strong\u003e 38mm\u003c\/li\u003e\n\u003cli type=\"disc\"\u003e\n\u003cstrong\u003eCase Width (with crown guards)\u003c\/strong\u003e 40mm\u003c\/li\u003e\n\u003cli type=\"disc\"\u003e\n\u003cstrong\u003eCase Thickness\u003c\/strong\u003e 10.86mm (Ultra Thin Solid) \/ 11.36mm (Thick Solid, 200m) \/ 11.76mm (Sapphire)\u003c\/li\u003e\n\u003cli type=\"disc\"\u003e\n\u003cstrong\u003eLug to Lug\u003c\/strong\u003e 46mm\u003c\/li\u003e\n\u003cli type=\"disc\"\u003e\n\u003cstrong\u003eLug Width\u003c\/strong\u003e 20mm\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003cstrong\u003eMaterials \u0026amp; Finish\u003c\/strong\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli type=\"disc\"\u003e\n\u003cstrong\u003eQuality\u003c\/strong\u003e Swiss Production Quality, ISO 9001 Certified\u003c\/li\u003e\n\u003cli type=\"disc\"\u003e\n\u003cstrong\u003eCase Material\u003c\/strong\u003e 316L Stainless Steel\u003c\/li\u003e\n\u003cli type=\"disc\"\u003e\n\u003cstrong\u003eCase Finishing\u003c\/strong\u003e Brushed (lug tops), Mirror polished (lug sides)\u003c\/li\u003e\n\u003cli type=\"disc\"\u003e\n\u003cstrong\u003eBezel\u003c\/strong\u003e Unidirectional rotating, 120-click (pre-fitted at workshop, exclusive to this case)\u003c\/li\u003e\n\u003cli type=\"disc\"\u003e\n\u003cstrong\u003eBezel Insert\u003c\/strong\u003e Black ceramic with Swiss Super-LumiNova® BGW9 Grade A lume pip\u003c\/li\u003e\n\u003cli type=\"disc\"\u003e\n\u003cstrong\u003eCrystal\u003c\/strong\u003e Flat Sapphire with clear AR coating (cyclops or no-cyclops, per selection)\u003c\/li\u003e\n\u003cli type=\"disc\"\u003e\n\u003cstrong\u003eCrown\u003c\/strong\u003e Screw down, SKX-style compatible\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003cstrong\u003eCompatibility\u003c\/strong\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli type=\"disc\"\u003e\n\u003cstrong\u003eMovements\u003c\/strong\u003e TYPE M: NH35, NH36, NH38, NH70, NH71, NH72\u003c\/li\u003e\n\u003cli type=\"disc\"\u003e\n\u003cstrong\u003eDials\u003c\/strong\u003e 28.5mm\u003c\/li\u003e\n\u003cli type=\"disc\"\u003e\n\u003cstrong\u003eChapter Rings\u003c\/strong\u003e SKX013-spec (required, sold separately)\u003c\/li\u003e\n\u003cli type=\"disc\"\u003e\n\u003cstrong\u003eHands\u003c\/strong\u003e NH movement compatible\u003c\/li\u003e\n\u003cli type=\"disc\"\u003e\n\u003cstrong\u003eCrowns\u003c\/strong\u003e 7mm SKX-style\u003c\/li\u003e\n\u003cli type=\"disc\"\u003e\n\u003cstrong\u003eBracelets\u003c\/strong\u003e Lucius Atelier bracelets only (designed exclusively for our cases)\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003cstrong\u003eWater Resistance\u003c\/strong\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli type=\"disc\"\u003e\n\u003cstrong\u003eUltra Thin Solid Caseback\u003c\/strong\u003e 100m \/ 10 ATM\u003c\/li\u003e\n\u003cli type=\"disc\"\u003e\n\u003cstrong\u003eThick Solid Caseback\u003c\/strong\u003e 200m \/ 20 ATM\u003c\/li\u003e\n\u003cli type=\"disc\"\u003e\n\u003cstrong\u003eSapphire Caseback\u003c\/strong\u003e 100m \/ 10 ATM\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003c\/li\u003e\n\u003cli id=\"tab2\"\u003e\n\u003cp\u003e\u003cem\u003eNew to Seiko modding? Here's everything you'll need for a complete, functioning watch — in the order you'd actually assemble it.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat's already in this purchase:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe case body, bezel + ceramic insert (pre-fitted), and your chosen caseback + crystal. That's the foundation. Everything below is what you'll add to make a functioning, wrist-ready watch.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe 5 parts you'll need for a complete watch:\u003c\/strong\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eChapter ring\u003c\/strong\u003e — required first. The chapter ring seats the dial at the correct height; without it, the dial sits too low and the hands won't clear.\u003cbr\u003e\n\u003cem\u003e(SKX013-spec — sold on a separate page. See the \"sold separately\" panel above for normal vs ultra thin guidance.)\u003c\/em\u003e\u003cbr\u003e\n\u003ca href=\"\/collections\/chapter-rings-swiss-quality-seiko-mod-parts\/skx013?sort_by=title-ascending\" target=\"_blank\" title=\"SKX013-compatible chapter rings\"\u003eBrowse compatible chapter rings \u003cspan class=\"glyphicon glyphicon-new-window\"\u003e\u003c\/span\u003e\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCrown\u003c\/strong\u003e — five SKX-style options. Pick a style that matches the watch's character.\u003cbr\u003e\n\u003cem\u003e(Required to add to cart. Selected from the dropdown above on this page.)\u003c\/em\u003e\u003cbr\u003e\n\u003ca href=\"\/collections\/crowns-for-skx013-diver-38\" target=\"_blank\" title=\"SKX013-compatible crowns\"\u003eBrowse compatible crowns \u003cspan class=\"glyphicon glyphicon-new-window\"\u003e\u003c\/span\u003e\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDial\u003c\/strong\u003e (28.5mm) — the face of the watch. The biggest aesthetic choice you'll make. Match it to your chosen movement (date \/ day+date \/ no-date dial).\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHands\u003c\/strong\u003e — paired with your dial. Most modders match lume colour across both hands and dial markers (BGW9 white-blue, C3 green, etc.).\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMovement\u003c\/strong\u003e — NH35 (date), NH36 (day+date), NH38 (no date), or source your own. The movement is the engine of the watch.\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003cstrong\u003eOptional finishing touches:\u003c\/strong\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli type=\"disc\"\u003e\n\u003cstrong\u003eBracelet or strap\u003c\/strong\u003e \u003cem\u003e(20mm lug)\u003c\/em\u003e — Lucius Atelier oyster, jubilee, president, GS, Seikonaut, Settimo, or more designs, plus custom shell cordovan \/ full-grain cowhide leather straps.\n\u003c\/li\u003e\n\u003cli type=\"disc\"\u003e\n\u003cstrong\u003eDecorated bridge + rotor\u003c\/strong\u003e \u003cem\u003e(only visible with sapphire caseback)\u003c\/em\u003e — replace the stock NH movement bridge and rotor with our Côtes de Genève decorated set, viewable through the sapphire caseback. Note: our bridges fit only our rotors (not OEM Seiko rotors), so they're chosen as a pair. \u003cem\u003eRecommended for experienced modders only — or tick Assemble Watch below and we'll handle it.\u003c\/em\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003cstrong\u003eWant it built for you?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eTick the \u003cstrong\u003eAssemble Watch (+SGD $50)\u003c\/strong\u003e option above on this page and we'll handle the full build in our Singapore workshop — case fitting, movement seating, crown alignment, caseback press, function check, and decorated bridge + rotor installation if you've added those.\u003c\/p\u003e\n\u003cp style=\"font-size: 13px; color: #555;\"\u003e\u003cem\u003eHeads up: assembled watches require \u003cstrong\u003e3–5 business days of workshop time\u003c\/strong\u003e before shipping.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp style=\"font-size: 13px; margin-top: 16px; padding-top: 12px; border-top: 1px dashed #ccc;\"\u003e\u003cem\u003eOnce your parts arrive, see the \u003cstrong\u003eHow To Mod\u003c\/strong\u003e tab for assembly tutorials.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli id=\"tab3\"\u003e\n\u003col\u003e\n\u003cli type=\"disc\"\u003e1x Watch Case Body (with pre-installed flat sapphire crystal — cyclops or no cyclops, per selection)\u003c\/li\u003e\n\u003cli type=\"disc\"\u003e1x Bezel + Black Ceramic Insert (pre-fitted, pre-aligned, with BGW9 Grade A lume pip)\u003c\/li\u003e\n\u003cli type=\"disc\"\u003e1x NH Caseback (Ultra Thin Solid \/ Thick Solid \/ Sapphire, per selection)\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003cspan style=\"color: #ff9900;\"\u003e\u003cem\u003eAll photos of watches with modification parts are for illustration purposes only and are not included with the case purchase.\u003c\/em\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli id=\"tab5\"\u003e\n\u003col\u003e\n\u003cli type=\"disc\"\u003e\u003ca title=\"TUTORIAL - How To Mod Your SEIKO Watch Dial \u0026amp; Hands by Lucius Atelier\" href=\"\/blogs\/news\/tutorial-how-to-modify-your-seiko-watch-dial-and-hands\" target=\"_blank\"\u003eA Complete Guide On How To Mod Your SEIKO Watch Dial And Hands (Photos \u0026amp; Video) \u003cspan class=\"glyphicon glyphicon-new-window\"\u003e\u003c\/span\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003cli type=\"disc\"\u003e\u003ca title=\"TIPS - Learn about fitting dials with four dial legs by Lucius Atelier\" href=\"\/blogs\/news\/tips-learn-about-fitting-dials-with-four-dial-legs\" target=\"_blank\"\u003eFitting dials with four dial legs \u003cspan class=\"glyphicon glyphicon-new-window\"\u003e\u003c\/span\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003cli type=\"disc\"\u003e\u003ca href=\"\/blogs\/news\/seiko-watch-modding-101\" target=\"_blank\"\u003eSeiko Modding: The Complete Build Guide (2026) \u003cspan class=\"glyphicon glyphicon-new-window\"\u003e\u003c\/span\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Lucius Atelier","offers":[{"title":"Ultra Thin Solid \/ Yes","offer_id":47599052587244,"sku":"Sub38UT.Black\/UT.Solid\/Cyc","price":167.3,"currency_code":"SGD","in_stock":true},{"title":"Ultra Thin Solid \/ No","offer_id":47594531356908,"sku":"Sub38UT.Black\/UT.Solid","price":160.3,"currency_code":"SGD","in_stock":true},{"title":"Thick Solid \/ Yes","offer_id":47599052620012,"sku":"Sub38UT.Black\/T.Solid\/Cyc","price":167.3,"currency_code":"SGD","in_stock":true},{"title":"Thick Solid \/ No","offer_id":47598834745580,"sku":"Sub38UT.Black\/T.Solid","price":160.3,"currency_code":"SGD","in_stock":true},{"title":"Sapphire \/ Yes","offer_id":47599052652780,"sku":"Sub38UT.Black\/Sapp\/Cyc","price":184.8,"currency_code":"SGD","in_stock":true},{"title":"Sapphire \/ No","offer_id":47594531389676,"sku":"Sub38UT.Black\/Sapp","price":177.8,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0012\/0386\/3612\/files\/skx013-diver-38mm-black-5_433dd17e-872c-4da3-b952-c488608f1121.jpg?v=1777978844"},{"product_id":"skx013-diver-38-green-ultra-thin-edition","title":"SKX013 Diver 38 Green — Ultra Thin Watch Case","description":"\u003ctable width=\"100%\" style=\"background-color: #1a1a1a; text-align: center;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px;\"\u003e\n\u003cspan style=\"color: #ffd006;\"\u003e\u003cstrong\u003e\u003cspan class=\"glyphicon glyphicon-time\"\u003e\u003c\/span\u003e EARLY ACCESS — FIRST PRODUCTION RUN\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cspan style=\"color: #ffffff; font-size: 13px;\"\u003e\u003cem\u003eTargeting 15 July 2026 ship date · 30% off · No repeat after launch\u003c\/em\u003e\u003c\/span\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c!-- split --\u003e\n\u003cp style=\"margin:0; padding:0; line-height:0;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0012\/0386\/3612\/files\/skx013-diver-38-green-mop-beach-1-1600x600.jpg?v=1778211236\" alt=\"SKX013 Diver 38 Green Ultra Thin on mossy stone in tropical jungle stream\" style=\"display:block; width:100%; height:auto; margin:0; padding:0; vertical-align:bottom;\"\u003e\u003c\/p\u003e\n\u003cdiv class=\"row\" style=\"background-color: #faf7f2; padding: 32px; margin-top: 0;\"\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cem\u003e\u003cstrong\u003eThe Sub Silhouette. Reborn Ultra Thin. Ready to Build.\u003c\/strong\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eInspired by the dive-watch silhouette that defined an era, the \u003cstrong\u003eSKX013 Diver 38\u003c\/strong\u003e, part of our Ultra Thin Edition series, is our ground-up reinterpretation — engineered to be among the \u003cstrong\u003ethinnest dive cases compatible with the NH movement\u003c\/strong\u003e on the market today.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eAchieving this profile meant rebuilding the case body from scratch. Every internal dimension was re-engineered to compress the case height without compromising structure. As a consequence, the \u003cstrong\u003ebezel and ceramic insert are unique to this case\u003c\/strong\u003e — standard SKX bezels and inserts will not fit, and ours will not fit a stock SKX. Bezel and insert are pre-fitted and aligned at our workshop. They can be removed by a watchmaker, but the design and parts are exclusive to us.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eWhat we did keep compatible: the things modders actually want flexibility on. \u003cstrong\u003eSKX-style crowns, SKX013-spec chapter ring, Seiko Mod dials (28.5mm), hands, and NH-series movements\u003c\/strong\u003e all work as expected. You get the thinnest dive-style profile on the market, paired with the modding ecosystem you already know.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center; margin-top: 20px; padding-top: 18px; border-top: 1px dashed #999;\"\u003e\u003cem\u003e\u003cstrong style=\"color: #0abab5;\"\u003eRoughly 10% cheaper than building it part-by-part — and ready to assemble.\u003c\/strong\u003e\u003cbr\u003eBuying our SKX-style case body, matching bezel, ceramic insert, and sapphire crystal separately would cost about 10% more than buying parts separately. And you skip the hardest parts of the build: \u003cstrong\u003eno crystal-pressing the sapphire, no fitting the rotating bezel, no sticking and aligning the ceramic insert.\u003c\/strong\u003e We ship it pre-fitted and pre-aligned. For a dive-style build with a rotating ceramic bezel, that's hours of finicky workshop time avoided.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"row\"\u003e\n\u003cdiv class=\"eight columns alpha\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #0abab5;\"\u003eWears 38, looks bigger.\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cem\u003eCase diameter 38mm. With crown guards the case width reaches 40mm. Lug-to-lug 46mm, lug width 20mm. A diver's silhouette on a small-wrist canvas. \u003ca href=\"\/blogs\/news\/38mm-watch-looks-smaller-case-proportion-guide\" title=\"Why this 38mm case wears bigger — measured against the SKX007\" target=\"_blank\"\u003eSee how we measured it against a 42.5mm SKX007 \u003cspan class=\"glyphicon glyphicon-new-window\"\u003e\u003c\/span\u003e\u003c\/a\u003e.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #0abab5;\"\u003eGenuinely thin.\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cem\u003e10.86mm with the Ultra Thin solid caseback — one of the thinnest NH-compatible dive cases ever made. The NH movement alone is 7.59mm. That leaves just a few millimeters for the crystal, walls, and hand clearance. Tight engineering.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"eight columns omega\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #0abab5;\"\u003eBuilt to dive (when you choose to).\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cem\u003eUp to 200m water resistance. Screw-down crown. Unidirectional 120-click rotating bezel with \u003cstrong\u003egreen ceramic insert\u003c\/strong\u003e and \u003cstrong\u003eSwiss Super-LumiNova® BGW9 Grade A\u003c\/strong\u003e lume pip. Bezel and insert ship pre-fitted and pre-aligned.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #0abab5;\"\u003eThree casebacks, two crystals.\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cem\u003ePick the Ultra Thin solid caseback for the headline thinness. Pick the thicker solid caseback for full 200m dive-rating. Pick the \u003cstrong\u003esapphire caseback to display the movement\u003c\/strong\u003e — and consider adding a \u003cstrong\u003edecorated bridge and rotor\u003c\/strong\u003e for a fully customised view through the back. Cyclops crystal pairs with NH35 only — the magnifier sits over the date window, so the dial must have one.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"row\"\u003e\n\u003ctable width=\"100%\" style=\"border-collapse: collapse; margin-top: 10px;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background-color: #1a1a1a; color: #ffffff;\"\u003e\n\u003cth style=\"padding: 12px; text-align: left;\"\u003eCaseback\u003c\/th\u003e\n\u003cth style=\"padding: 12px; text-align: center;\"\u003eTotal Thickness\u003c\/th\u003e\n\u003cth style=\"padding: 12px; text-align: center;\"\u003eWater Resistance\u003c\/th\u003e\n\u003cth style=\"padding: 12px; text-align: left;\"\u003eBest for\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background-color: #f0fafa; border-left: 4px solid #0abab5;\"\u003e\n\u003ctd style=\"padding: 12px;\"\u003e\n\u003cstrong\u003eUltra Thin Solid\u003c\/strong\u003e \u003cspan style=\"color: #0abab5; font-size: 11px; font-weight: bold;\"\u003e · HEADLINE BUILD\u003c\/span\u003e\n\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; text-align: center;\"\u003e\u003cstrong\u003e10.86mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; text-align: center;\"\u003e100m \/ 10 ATM\u003c\/td\u003e\n\u003ctd style=\"padding: 12px;\"\u003eDaily wear — the thinnest profile\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e5e5e5;\"\u003e\n\u003ctd style=\"padding: 12px;\"\u003e\u003cstrong\u003eThick Solid\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; text-align: center;\"\u003e11.36mm\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; text-align: center;\"\u003e\u003cstrong\u003e200m \/ 20 ATM\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 12px;\"\u003eModders who actually take it diving\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e5e5e5;\"\u003e\n\u003ctd style=\"padding: 12px;\"\u003e\u003cstrong\u003eSapphire\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; text-align: center;\"\u003e11.76mm\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; text-align: center;\"\u003e100m \/ 10 ATM\u003c\/td\u003e\n\u003ctd style=\"padding: 12px;\"\u003eMovement display — show off the rotor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp style=\"margin-top: 12px; font-size: 13px; color: #555;\"\u003e\u003cem\u003eThe Ultra Thin Solid caseback is the headline build — this is the case at its slimmest. The other two are for buyers prioritising dive-rating or movement display, and add slight thickness in exchange.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"row\" style=\"background-color: #f4f4f4; padding: 20px; border-left: 4px solid #0abab5; margin-top: 20px;\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan class=\"glyphicon glyphicon-info-sign\"\u003e\u003c\/span\u003e Heads up — sold separately\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"font-size: 14px; margin-bottom: 10px;\"\u003e\u003cem\u003e\u003cstrong\u003eCrown.\u003c\/strong\u003e The crown shown in product photos is for visual reference only. Crowns must be selected above — choose from 5 SKX013-compatible options. \u003ca href=\"\/collections\/crowns-for-skx013-diver-38\" title=\"SKX013-compatible crowns\" target=\"_blank\"\u003eBrowse compatible crowns \u003cspan class=\"glyphicon glyphicon-new-window\"\u003e\u003c\/span\u003e\u003c\/a\u003e.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp style=\"font-size: 14px; margin-bottom: 0;\"\u003e\u003cem\u003e\u003cstrong\u003eChapter ring.\u003c\/strong\u003e This case requires a \u003cstrong\u003eSKX013-spec chapter ring\u003c\/strong\u003e to seat the dial correctly — without it, the dial sits too low and hands won't clear. The case \u003cstrong\u003efits both normal and ultra thin chapter rings\u003c\/strong\u003e; the choice depends on your \u003cstrong\u003edial\u003c\/strong\u003e, not the case. If your dial has applied (raised) indices, choose ultra thin for clearance. If flat-printed, either works. \u003cstrong\u003eWhen in doubt, ultra thin is the safer default.\u003c\/strong\u003e \u003ca href=\"\/collections\/chapter-rings-swiss-quality-seiko-mod-parts\/skx013?sort_by=title-ascending\" title=\"SKX013-compatible chapter rings\" target=\"_blank\"\u003eBrowse compatible chapter rings \u003cspan class=\"glyphicon glyphicon-new-window\"\u003e\u003c\/span\u003e\u003c\/a\u003e.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"row\" style=\"background-color: #fff5f5; padding: 18px; border-left: 4px solid #ff2a00; margin-top: 12px;\"\u003e\n\u003cp\u003e\u003cstrong style=\"color: #ff2a00;\"\u003e\u003cspan class=\"glyphicon glyphicon-warning-sign\"\u003e\u003c\/span\u003e For experienced modders only — TYPE M movements only\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"font-size: 14px; margin-bottom: 0; color: #7a1f1f;\"\u003e\u003cem\u003eThis case fits \u003cstrong\u003eTYPE M\u003c\/strong\u003e versions of NH35, NH36, NH38, NH70, NH71, NH72 only. \u003cstrong\u003eTYPE L will NOT fit.\u003c\/strong\u003e Due to tight clearance between hands and sapphire, this case is recommended only for professional watchmakers and experienced modders.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!--Start tab labels--\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli\u003e\u003ca class=\"active\" href=\"#tab1\"\u003eSpecs\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"#tab2\"\u003eBuild Guide\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"#tab3\"\u003eWhat's Included\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"#tab5\"\u003eHow To Mod\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!--Start tab content--\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli style=\"list-style-type: none;\" class=\"active\" id=\"tab1\"\u003e\n\u003cp\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli type=\"disc\"\u003e\n\u003cstrong\u003eCase Diameter\u003c\/strong\u003e 38mm\u003c\/li\u003e\n\u003cli type=\"disc\"\u003e\n\u003cstrong\u003eCase Width (with crown guards)\u003c\/strong\u003e 40mm\u003c\/li\u003e\n\u003cli type=\"disc\"\u003e\n\u003cstrong\u003eCase Thickness\u003c\/strong\u003e 10.86mm (Ultra Thin Solid) \/ 11.36mm (Thick Solid, 200m) \/ 11.76mm (Sapphire)\u003c\/li\u003e\n\u003cli type=\"disc\"\u003e\n\u003cstrong\u003eLug to Lug\u003c\/strong\u003e 46mm\u003c\/li\u003e\n\u003cli type=\"disc\"\u003e\n\u003cstrong\u003eLug Width\u003c\/strong\u003e 20mm\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003cstrong\u003eMaterials \u0026amp; Finish\u003c\/strong\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli type=\"disc\"\u003e\n\u003cstrong\u003eQuality\u003c\/strong\u003e Swiss Production Quality, ISO 9001 Certified\u003c\/li\u003e\n\u003cli type=\"disc\"\u003e\n\u003cstrong\u003eCase Material\u003c\/strong\u003e 316L Stainless Steel\u003c\/li\u003e\n\u003cli type=\"disc\"\u003e\n\u003cstrong\u003eCase Finishing\u003c\/strong\u003e Brushed (lug tops), Mirror polished (lug sides)\u003c\/li\u003e\n\u003cli type=\"disc\"\u003e\n\u003cstrong\u003eBezel\u003c\/strong\u003e Unidirectional rotating, 120-click (pre-fitted at workshop, exclusive to this case)\u003c\/li\u003e\n\u003cli type=\"disc\"\u003e\n\u003cstrong\u003eBezel Insert\u003c\/strong\u003e Green ceramic with Swiss Super-LumiNova® BGW9 Grade A lume pip\u003c\/li\u003e\n\u003cli type=\"disc\"\u003e\n\u003cstrong\u003eCrystal\u003c\/strong\u003e Flat Sapphire with clear AR coating (cyclops or no-cyclops, per selection)\u003c\/li\u003e\n\u003cli type=\"disc\"\u003e\n\u003cstrong\u003eCrown\u003c\/strong\u003e Screw down, SKX-style compatible\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003cstrong\u003eCompatibility\u003c\/strong\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli type=\"disc\"\u003e\n\u003cstrong\u003eMovements\u003c\/strong\u003e TYPE M: NH35, NH36, NH38, NH70, NH71, NH72\u003c\/li\u003e\n\u003cli type=\"disc\"\u003e\n\u003cstrong\u003eDials\u003c\/strong\u003e 28.5mm\u003c\/li\u003e\n\u003cli type=\"disc\"\u003e\n\u003cstrong\u003eChapter Rings\u003c\/strong\u003e SKX013-spec (required, sold separately)\u003c\/li\u003e\n\u003cli type=\"disc\"\u003e\n\u003cstrong\u003eHands\u003c\/strong\u003e NH movement compatible\u003c\/li\u003e\n\u003cli type=\"disc\"\u003e\n\u003cstrong\u003eCrowns\u003c\/strong\u003e 7mm SKX-style\u003c\/li\u003e\n\u003cli type=\"disc\"\u003e\n\u003cstrong\u003eBracelets\u003c\/strong\u003e Lucius Atelier bracelets only (designed exclusively for our cases)\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003cstrong\u003eWater Resistance\u003c\/strong\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli type=\"disc\"\u003e\n\u003cstrong\u003eUltra Thin Solid Caseback\u003c\/strong\u003e 100m \/ 10 ATM\u003c\/li\u003e\n\u003cli type=\"disc\"\u003e\n\u003cstrong\u003eThick Solid Caseback\u003c\/strong\u003e 200m \/ 20 ATM\u003c\/li\u003e\n\u003cli type=\"disc\"\u003e\n\u003cstrong\u003eSapphire Caseback\u003c\/strong\u003e 100m \/ 10 ATM\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003c\/li\u003e\n\u003cli id=\"tab2\"\u003e\n\u003cp\u003e\u003cem\u003eNew to Seiko modding? Here's everything you'll need for a complete, functioning watch — in the order you'd actually assemble it.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat's already in this purchase:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe case body, bezel + ceramic insert (pre-fitted), and your chosen caseback + crystal. That's the foundation. Everything below is what you'll add to make a functioning, wrist-ready watch.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe 5 parts you'll need for a complete watch:\u003c\/strong\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eChapter ring\u003c\/strong\u003e — required first. The chapter ring seats the dial at the correct height; without it, the dial sits too low and the hands won't clear.\u003cbr\u003e\n\u003cem\u003e(SKX013-spec — sold on a separate page. See the \"sold separately\" panel above for normal vs ultra thin guidance.)\u003c\/em\u003e\u003cbr\u003e\n\u003ca href=\"\/collections\/chapter-rings-swiss-quality-seiko-mod-parts\/skx013?sort_by=title-ascending\" target=\"_blank\" title=\"SKX013-compatible chapter rings\"\u003eBrowse compatible chapter rings \u003cspan class=\"glyphicon glyphicon-new-window\"\u003e\u003c\/span\u003e\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCrown\u003c\/strong\u003e — five SKX-style options. Pick a style that matches the watch's character.\u003cbr\u003e\n\u003cem\u003e(Required to add to cart. Selected from the dropdown above on this page.)\u003c\/em\u003e\u003cbr\u003e\n\u003ca href=\"\/collections\/crowns-for-skx013-diver-38\" target=\"_blank\" title=\"SKX013-compatible crowns\"\u003eBrowse compatible crowns \u003cspan class=\"glyphicon glyphicon-new-window\"\u003e\u003c\/span\u003e\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDial\u003c\/strong\u003e (28.5mm) — the face of the watch. The biggest aesthetic choice you'll make. Match it to your chosen movement (date \/ day+date \/ no-date dial).\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHands\u003c\/strong\u003e — paired with your dial. Most modders match lume colour across both hands and dial markers (BGW9 white-blue, C3 green, etc.).\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMovement\u003c\/strong\u003e — NH35 (date), NH36 (day+date), NH38 (no date), or source your own. The movement is the engine of the watch.\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003cstrong\u003eOptional finishing touches:\u003c\/strong\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli type=\"disc\"\u003e\n\u003cstrong\u003eBracelet or strap\u003c\/strong\u003e \u003cem\u003e(20mm lug)\u003c\/em\u003e — Lucius Atelier oyster, jubilee, president, GS, Seikonaut, Settimo, or more designs, plus custom shell cordovan \/ full-grain cowhide leather straps.\n\u003c\/li\u003e\n\u003cli type=\"disc\"\u003e\n\u003cstrong\u003eDecorated bridge + rotor\u003c\/strong\u003e \u003cem\u003e(only visible with sapphire caseback)\u003c\/em\u003e — replace the stock NH movement bridge and rotor with our Côtes de Genève decorated set, viewable through the sapphire caseback. Note: our bridges fit only our rotors (not OEM Seiko rotors), so they're chosen as a pair. \u003cem\u003eRecommended for experienced modders only — or tick Assemble Watch below and we'll handle it.\u003c\/em\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003cstrong\u003eWant it built for you?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eTick the \u003cstrong\u003eAssemble Watch (+SGD $50)\u003c\/strong\u003e option above on this page and we'll handle the full build in our Singapore workshop — case fitting, movement seating, crown alignment, caseback press, function check, and decorated bridge + rotor installation if you've added those.\u003c\/p\u003e\n\u003cp style=\"font-size: 13px; color: #555;\"\u003e\u003cem\u003eHeads up: assembled watches require \u003cstrong\u003e3–5 business days of workshop time\u003c\/strong\u003e before shipping.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp style=\"font-size: 13px; margin-top: 16px; padding-top: 12px; border-top: 1px dashed #ccc;\"\u003e\u003cem\u003eOnce your parts arrive, see the \u003cstrong\u003eHow To Mod\u003c\/strong\u003e tab for assembly tutorials.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli id=\"tab3\"\u003e\n\u003col\u003e\n\u003cli type=\"disc\"\u003e1x Watch Case Body (with pre-installed flat sapphire crystal — cyclops or no cyclops, per selection)\u003c\/li\u003e\n\u003cli type=\"disc\"\u003e1x Bezel + Green Ceramic Insert (pre-fitted, pre-aligned, with BGW9 Grade A lume pip)\u003c\/li\u003e\n\u003cli type=\"disc\"\u003e1x NH Caseback (Ultra Thin Solid \/ Thick Solid \/ Sapphire, per selection)\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003cspan style=\"color: #ff9900;\"\u003e\u003cem\u003eAll photos of watches with modification parts are for illustration purposes only and are not included with the case purchase.\u003c\/em\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli id=\"tab5\"\u003e\n\u003col\u003e\n\u003cli type=\"disc\"\u003e\u003ca title=\"TUTORIAL - How To Mod Your SEIKO Watch Dial \u0026amp; Hands by Lucius Atelier\" href=\"\/blogs\/news\/tutorial-how-to-modify-your-seiko-watch-dial-and-hands\" target=\"_blank\"\u003eA Complete Guide On How To Mod Your SEIKO Watch Dial And Hands (Photos \u0026amp; Video) \u003cspan class=\"glyphicon glyphicon-new-window\"\u003e\u003c\/span\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003cli type=\"disc\"\u003e\u003ca title=\"TIPS - Learn about fitting dials with four dial legs by Lucius Atelier\" href=\"\/blogs\/news\/tips-learn-about-fitting-dials-with-four-dial-legs\" target=\"_blank\"\u003eFitting dials with four dial legs \u003cspan class=\"glyphicon glyphicon-new-window\"\u003e\u003c\/span\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003cli type=\"disc\"\u003e\u003ca href=\"\/blogs\/news\/seiko-watch-modding-101\" target=\"_blank\"\u003eSeiko Modding: The Complete Build Guide (2026) \u003cspan class=\"glyphicon glyphicon-new-window\"\u003e\u003c\/span\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Lucius Atelier","offers":[{"title":"Ultra Thin Solid \/ Yes","offer_id":47600040083692,"sku":"Sub38UT.Green\/UT.Solid\/Cyc","price":174.3,"currency_code":"SGD","in_stock":true},{"title":"Ultra Thin Solid \/ No","offer_id":47600040116460,"sku":"Sub38UT.Green\/UT.Solid","price":167.3,"currency_code":"SGD","in_stock":true},{"title":"Thick Solid \/ Yes","offer_id":47600040149228,"sku":"Sub38UT.Green\/T.Solid\/Cyc","price":174.3,"currency_code":"SGD","in_stock":true},{"title":"Thick Solid \/ No","offer_id":47600040181996,"sku":"Sub38UT.Green\/T.Solid","price":167.3,"currency_code":"SGD","in_stock":true},{"title":"Sapphire \/ Yes","offer_id":47600040214764,"sku":"Sub38UT.Green\/Sapp\/Cyc","price":191.8,"currency_code":"SGD","in_stock":true},{"title":"Sapphire \/ No","offer_id":47600040247532,"sku":"Sub38UT.Green\/Sapp","price":184.8,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0012\/0386\/3612\/files\/skx013-diver-38mm-green-5.jpg?v=1777985093"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0012\/0386\/3612\/collections\/skx013-diver-38-black-side-view-2048_1024_1260a853-c385-44dc-a107-de87bff077ec.jpg?v=1778240498","url":"https:\/\/luciusatelier.com\/collections\/skx013-diver-38.oembed","provider":"Lucius Atelier","version":"1.0","type":"link"}