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SKX013 Diver 38 Black Ultra Thin Edition — side profile showing 10.86mm ultra-thin case thickness

Ultra Thin Edition
Seikonaut Bracelet 20/16mm [TITANIUM] - - - - Lucius Atelier - Swiss Quality Seiko Watch Mod Parts

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  • SKX013 Diver 38 Black Ultra Thin Edition — side profile showing 10.86mm ultra-thin case thickness

    Ultra Thin Edition
  • Seikonaut Bracelet 20/16mm [TITANIUM] - - - - Lucius Atelier - Swiss Quality Seiko Watch Mod Parts

    Seikonaut
    • Home / Products / The Great Oak Dial - Ice Blue (Open Heart)
    The Great Oak Dial - Ice Blue (Open Heart) - - - - Lucius Atelier - Swiss Quality Seiko Watch Mod Parts
    The Great Oak Dial - Ice Blue (Open Heart) - - - - Lucius Atelier - Swiss Quality Seiko Watch Mod Parts
    The Great Oak Dial - Ice Blue (Open Heart) - - - - Lucius Atelier - Swiss Quality Seiko Watch Mod Parts
    The Great Oak Dial - Ice Blue (Open Heart) - - - - Lucius Atelier - Swiss Quality Seiko Watch Mod Parts
    The Great Oak Dial - Ice Blue (Open Heart) - - - - Lucius Atelier - Swiss Quality Seiko Watch Mod Parts
    The Great Oak Dial - Ice Blue (Open Heart) - - - - Lucius Atelier - Swiss Quality Seiko Watch Mod Parts

    The Great Oak Dial - Ice Blue (Open Heart)

    $96 SGD

    LIMITED EDITION · 100 pieces only. Once this run sells out, this dial is retired for good — never remade.

    The Great Oak Dial. Grande Tapisserie Guilloché. Ice Blue. Open Heart.

    An homage to the most recognisable face in integrated-sport watchmaking — the octagonal-bezel “tapisserie” dial — reimagined at 28.5mm for the Seiko mod world. The pattern is a true “Grande Tapisserie” guilloché: a dense pyramid grid machined into the surface, not printed on top.

    Look closer and there are two levels of guilloché — a finer field below, a bolder one above — that catch light at different angles, so the dial throws a shifting sunburst as the wrist moves. It’s finished in a cool ice blue that reads crisp under glass. Each blank is CNC-embossed over roughly an hour before it is even decorated.

    The hour markers are polished-silver applied indices — beveled, raised metal, mirror-finished — set into the guilloché and filled with 100% Swiss Super-LumiNova® BGW9 Grade A. White by day, a cool ice-blue glow by night, holding up to eight hours on a full charge.

    A statement dial, built for a statement watch.
    As a standard 28.5mm dial it fits any case cut for that size — pair it with a brushed ice-blue chapter ring and matching hands to finish the look. Browse the full dial range .

    Grande Tapisserie, machined not printed.
    A dense pyramid-grid guilloché cut into the surface in two levels, throwing a shifting sunburst as light moves across it. Finished in a cool ice blue — crisp, fresh, and unmistakable under the crystal.

    Polished applied indices, BGW9 Grade A lume.
    Beveled, raised silver indices — mirror-finished and set into the pattern, not flat print — filled with 100% Swiss Super-LumiNova® BGW9 Grade A. Clean white by day, a cool ice-blue glow by night.

    Open heart over the balance.
    An aperture is cut into the face to reveal the movement's balance wheel — the beating heart of the watch — through the dial. It's built for the open-heart NH family on a 3 o'clock crown.

    Two feet, NH38 family.
    Matched to one movement family, the dial comes with two feet already in position — nothing to clip. Built for the Seiko NH38 (the NH70, NH71 and NH72 fit too), whose balance the opening is positioned to frame.

    Choose your Great Oak dial

    Variant Complication Movement Notes
    The Great Oak (No Date) No date NH38 (NH35 / NH36 / NH70–72 also fit) Clean face · 4 legs
    The Great Oak (Date) Date NH35 (NH36 also fits) Date window · 4 legs
    The Great Oak (Day Date) Day-Date NH36 only Day + date · 4 legs
    The Great Oak (Open Heart) — you're viewing Open heart NH38 (NH70 / NH71 / NH72 also fit) Balance aperture · 2 feet, no clipping
    The Great Oak (GMT) GMT (24H) NH34 only 2.7mm bore · 4 legs

    Heads up — a dial is one part of the build

    Hands. A dial needs a matching set of hands to tell time. For this dial we recommend our The Great Oak Hands in Polished Silver — the polished-silver set drawn to match the dial’s applied indices and ice-blue field.

    Movement. This dial needs an open-heart NH38-family caliber (NH38, NH70, NH71 or NH72) so the aperture frames the balance wheel. Browse calibers in the Movements collection .

    Questions, Answered

    Everything worth knowing before you build.

    What is the Great Oak dial's finish?

    The Great Oak is a “Grande Tapisserie” guilloché dial — a dense pyramid-grid pattern machined into the surface in two levels, not printed on top. The two depths catch light at different angles, so the face throws a shifting sunburst as the wrist moves. It’s finished in a cool ice blue, and each blank is CNC-embossed over roughly an hour before it’s decorated. The hour markers are polished-silver applied (raised) indices filled with 100% Swiss Super-LumiNova® BGW9 Grade A — white by day, a cool ice-blue glow by night. It’s an oblique homage to the iconic octagonal integrated-sport dial, reimagined at the 28.5mm Seiko mod standard.

    Will this dial fit my case?

    Yes, almost certainly. This is a standard Seiko mod dial — 28.5mm in diameter and 0.4mm thick, the industry-standard size — so it fits most, if not all, Seiko cases. Where a dial is shown with a particular case, that's an aesthetic pairing, not a fitment requirement. If you're unsure, the surest check is to remove your current dial and measure it with a vernier caliper.

    Are the markers applied or printed?

    Applied. The hour markers are applied (raised) indices — raised metal on the dial surface, not flat print. The relief is what gives the face its depth and light play as the wrist moves.

    Does this dial have lume?

    Yes — the applied indices are filled with 100% Swiss Super-LumiNova® BGW9 Grade A: a cool blue glow by night, white by day, lasting up to eight hours on a full charge. For maximum glow, pair it with hands that also carry BGW9 so the whole face glows together (hands are sold separately).

    What is an open-heart dial / which movement does it need?

    An open-heart dial has an aperture cut into the face to reveal the movement's balance wheel — the beating heart of the watch — through the dial. It's built for the open-heart NH family on a 3 o'clock crown: the Seiko NH38 (the NH70, NH71 and NH72 fit too), whose balance the opening is positioned to frame. Because it's matched to that one family, the dial comes with two feet already in position — nothing to clip.

    Does this dial work with a normal or an ultra thin chapter ring?

    Both our normal and ultra thin chapter rings fit this dial. Where a dial has applied (raised) indices, they sit within the clearance of either ring — so the choice is purely about looks: the ultra thin chapter ring sits low and discreet, while the normal sits a little more pronounced. Pick whichever suits your style.

    Are hands included with this dial?

    No — dials and hands are sold separately. This listing is for the dial only; choose a matching handset to complete the build. If your dial is lumed, pairing it with lumed hands in the same lume type keeps the whole face glowing together.

    Is this a limited edition / will it be restocked?

    Yes, it's a limited edition, and it won't be restocked. Once the run sells out it's retired for good. The edition size is shown on the product page.

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