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    ⚙ CONFIGURATOR
    Build Your Own Visually

    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
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    Build Your Own Visually

  • 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 / SKX Solid Caseback - Silver Mirror Polished
    SKX Solid Caseback - Silver Mirror Polished - - - - Lucius Atelier - Swiss Quality Seiko Watch Mod Parts

    SKX Solid Caseback - Silver Mirror Polished

    $22 SGD
    Worldwide
    Delivery         Express
    2–4 Days         Replies In
    1 Day         30-Day
    Returns

    The Solid Caseback. Mirror polished. For SKX builds.

    The standard solid caseback — the simplest, cleanest way to close a build. Mirror-polished 316L stainless steel, made for our SKX013 mod cases and the OEM Seiko SKX013 and SKX007.

    Water pressure tested to 200m — properly installed and tightened, it's Diver's-200m rated. 1.3mm thick; if you're chasing a lower profile, the 0.75mm slim version trades down to 100m for the thinness.

    Clean and closed.
    The classic back — solid, polished, 200m.

    Solid steel.
    A plain mirror-polished cover — the cleanest look a build can wear.

    Mirror-polished 316L.
    Machined stainless steel, polished to a mirror.

    200m rated.
    Water pressure tested to 200m, properly installed and tightened.

    Six cases only.
    Our SKX013 Submariner 36mm, GS Diver 36mm and 38mm cases (standard & DLC), plus the OEM Seiko SKX013 and SKX007.

    Heads up — fit & install

    Fits our SKX013 Submariner 36mm, GS Diver 36mm and 38mm cases (standard & DLC Black Edition), plus the OEM Seiko SKX013 and SKX007 — links under Specs.

    No gasket included. Unlike most watches, SKX gaskets sit on the outside of the case, so every case takes its own gasket size — one case's gasket will not fit another. That is why gaskets ship with the case, never with the caseback.

    New to this? Seiko Modding: The Complete Build Guide walks through the whole build.

    Questions, Answered

    Everything worth knowing before you build.

    What's the difference between a solid and a sapphire caseback?

    A solid caseback is a plain steel cover — the cleanest look, and the standard version is water pressure tested to 200m when properly installed. A sapphire caseback sets a sapphire crystal into the steel ring, turning the back into a window on the movement. If you've fitted a decorated rotor or bridge, the sapphire back is what lets you see it.

    Will these casebacks fit my SKX007 or SKX013?

    Yes — they're designed for SKX cases, covering both the SKX007 family (7S26-0020) and the SKX013 family (7S26-0030), on builds running Seiko NH movements.

    Why choose the slim solid caseback?

    It cuts the caseback's thickness from 1.3mm to 0.75mm, which lowers the finished watch's profile on the wrist. The trade-off is water resistance: the slim version is pressure tested to 100m, against 200m for the standard solid caseback.

    • 5 stars: 2 (100%)
    • 4 stars: 0 (0%)
    • 3 stars: 0 (0%)
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    N
    Nicholas T. (Melbourne, US)
    Caseback

    Solid caseback, no issues and very high quality. Ties everything together.

    J
    J. (Arnold, US)
    superb

    superb quality caseback and i can tell it was well built and robust ! it came quickly and Adriel is a fantastic resource for watch modding as well as any parts questions you may have

    A
    Andrew D.

    Does the caseback include a gasket?

    Adriel from LuciusAtelier.com

    Hello Andrew!

    Thanks for expressing interest in our mod parts!

    >> Does the caseback include a gasket?
    No, it does not. Case already comes with a gasket.

    Hope this helps. Let me know if you have any more questions.

    Cheers,
    Adriel

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