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SKX Sapphire Caseback - Silver
$45 SGD
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The Exhibition Back. Sapphire. For SKX builds.
The sapphire caseback turns the back of your watch into a window — the NH movement, the rotor swinging, the whole caliber on display. A sapphire crystal set into a 316L stainless steel ring, 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. Running a decorated rotor or bridge? This is the back that makes them worth it.
Show the movement.
The back worth turning the watch over for.
Sapphire window.
A sapphire crystal set into the steel ring — the movement stays on display.
316L, polished edge.
Machined stainless steel carrying the sapphire — see Specs for the detail.
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. Fitted a decorated rotor or bridge? The sapphire back is what lets you see them.
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.
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Specs
- Quality Swiss Production Quality, ISO 9001 Certified
- Material 316L Stainless Steel
- Surface Finish Polished Edge
- Crystal Sapphire
- Thickness 1.8mm
- Water Resistant 200m
- Fit These eight cases only — listed below
Fits these cases only
- SKX013 Submariner Watch Case — 36mm
- SKX013 Submariner Watch Case — 36mm (DLC Black Edition)
- SKX013 GS Diver Watch Case — 36mm
- SKX013 GS Diver Watch Case — 36mm (DLC Black Edition)
- SKX013 Watch Case — 38mm
- SKX013 Watch Case — 38mm (DLC Black Edition)
- OEM Seiko SKX013
- OEM Seiko SKX007
It will not fit any other case.
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- 1x Caseback
No gasket included. SKX gaskets are case-specific and sit on the outside of the case — they come with the case, not the caseback.
All photos of watches with modification parts are for illustration purposes only and are not included with the purchase.
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Fits our SKX013 Submariner 36mm, GS Diver 36mm and 38mm cases (standard & DLC Black Edition), plus the OEM Seiko SKX013 and SKX007. See the Specs tab for links to each case.
Pairs with:
Questions, Answered
Everything worth knowing before you build.
What's the difference between a solid and a sapphire caseback?
Will these casebacks fit my SKX007 or SKX013?
Why choose the slim solid caseback?
L
Using this mod part for: Skx007/submariner mod case
If you’re like me and shudder at the thought of reducing a diver’s build’s water resistance to 100m for full movement displaying, you might be familiar with 200m display casebacks being chunky and having a very small sapphire diameter.
This 200m caseback has a very large sapphire (almost as big as 100m ones) AND is not only thinner than other 200m sapphire cbs, but has that larger window. One other bonus is that LA used a white gasket, which is not going to stick out like a black gasket.
Seriously, best in class for a 200m build.
A
Using this mod part for: Tokeilab SKX007 case
Look nowhere else, this is the best caseback you could possibly find for the SKX007!
It has a beautiful polished finish and the size of the sapphire is excellent.
It displays the GORGEOUS Lucius Atelier gold rotor perfectly! (I will leave a separate review for that amazing rotor)
This will be the only caseback I will ever consider if I build another SKX.
R
Was expecting it would end up on the larger size and it's quite nicely built. It's not slim by any means but among the smaller case backs with a 200m rating.
B
Using this mod part for: Skx007 and 013
Service is very fast and correct!
A
Is the gasket included with this caseback?
Hello Andi!
Thanks for expressing interest in our mod parts!
>> Is the gasket included with this caseback?
Nope, not with CB. Gasket comes with the case. As long as you have a case, you should have a CB gasket on hand already.
Hope this helps. Let me know if you have any more questions.
Cheers,
Adriel
A
Hello,
Does this case back fit the GS V2 case?
Thanks
Hello Adam!
Thanks for expressing interest in our mod parts!
>> Does this case back fit the GS V2 case?
No, it does not fit. However, if you need sapphire caseback for GS case, you can get it here: https://luciusatelier.com/products/explorer-watch-case-v2-39mm?variant=41037455982755
Cheers,
Adriel
J
What's the diameter of the sapphire glass on this case back?
Hello Jack!
Thank you for expressing interest in our mod parts!
>> What's the diameter of the sapphire glass on this case back?
24.5mm
Hope this helps. Let me know if you have any more questions.
Cheers,
Adriel
