Your Cart is Empty

SKX013 GS Diver Watch Case - 36mm (DLC BLACK EDITION) [NH34-Ready]

10 main components required to complete a watch.
Watch Case
Bezel Insert
Chapter Ring
GMT 24H Hand (optional)
Bracelet (optional)
Strap (optional)
Bridge & Rotor (optional)
Movement Holder (optional)
Tweezer (optional)


  • For pilot bezel or insert-less bezel usage, bezel insert is not required and reduced to 9 main components.
  • For GMT/NH34 watch route, additional part selection of GMT 24H Hand is required. A dial designed specially for GMT/NH34 movement is also required, these can be found here .
  • (Optional) To add bracelet or strap, select your Bracelet or Strap.
  • (Optional) To decorate movement, select your Bridge and Rotor. Recommended with sapphire caseback.
  • (Optional) To have watch assembled, select Assemble Watch. Please note that assembling the entire timepiece requires 2 to 5 business days prior to shipping.

Engineered by us and made exclusively for us with quality assurance by ISO 9001 Certified manufacturers.


The smallest GS diver watch case on the market!!

Fit a bezel insert and this piece will look huge on a wrist.

Now in DLC BLACK EDITION!! The god tier coating in the market.

What is DLC?
Diamond-like carbon (DLC) is a class of amorphous carbon material that displays some of the typical properties of diamond. As the name suggests, diamond-like-carbon means that the layer is as scratch-resistant as diamonds. DLC coating has 5 times the hardness of a 316L stainless steel. With DLC being harder than steel, this means that a DLC coated watch will have a very high resistance to scratches that you will not have to worry about scratching your watch. This coating will not disappear if you accidentally do something that would otherwise leave a huge mark on some PVD-method coated watches. A feature that is highly coveted by many watch enthusiasts.

Drilled through lugs with a unique small 36mm size and is GMT NH34 Movement READY!!

Case fits all our SKX013 mod parts (excluding bracelet). Vastly increasing the modding outlook of the final piece to your preference.

Designed to fit all of our dials (28.5mm) and original NH movements (grey dial holding spacer).

Bracelet selections are made available in the dropdown list above or in the bracelet category .

Watch case tested to 200m water resistant.
    1. Quality Swiss Production Quality, ISO 9001 Certified
    2. Case Material 316L Stainless Steel, DLC Black Coating
    3. Case Diameter 36mm
    4. Case Thickness 9mm (Not including caseback and crystal)
    5. Lug to Lug 44mm
    6. Lug Width 20mm
    7. Crown Screw down
    8. Springbars Universal
    9. Water Resistant 200m / 20atm
    10. Fit Movements NH34, NH35, NH36, NH38, NH70, NH71, NH72
    1. 1x Watch Case
    2. 1x Bezel Click Spring
    3. 1x Crystal Gasket
    4. 1x Caseback Gasket

    *Springbars required are included with bracelet and strap.
    **All photos of watches with modification parts are for illustration purposes only and are not included with modification parts purchased.

  • Recommended Mods With:

    1. SKX013 Mod Parts
    1. A Complete Guide On How To Mod Your SEIKO Watch Dial And Hands (Includes Photos & Video)
    2. Learn about fitting dials with four dial legs

Customer Reviews

Based on 1 review
Nate (Kent City, US)
Using this mod part for: SKX013
Solid case

Great case for a small wrist build. I have it pictured solo and with a SKX007 pattern to make a His/Hers build set for comparison. (007 on the left with green Nato band, the Lucius Atelier 013 case build on the right in all black).

It fits standard 013 compatibilities across the board with a couple exceptions. I assume it fits a standard 013 band, but can’t confirm. Brushing and polish are beautiful. Obviously it’s a modification from the SKX013 pattern to be a slightly smaller 36mm. Standalone, the final build feels somewhat topheavy compared to the 007 that has some 42mm of width to spread out the height, but on a smaller wrist, it works way better than the larger diameter overall. Very nice changes to fit a full feature mechanical dive watch on a lady wrist.

It’s been worn pretty hard for a couple months now with no scratches visible, so I’m not disappointed in the coating. No surprise, I have a DLC socket set with no scratches either.

I have only two negatives to point out.
1 - The inside edge of the lugs should have, in my opinion, been more chamfered, or at least the edge relieved. It’s a hard 90 degree edge there. With a passthrough or nato strap, it’s held away from the skin so no problem, but I can see this being uncomfortable on a leather band.
2 - The lugs are drilled a bit small. You’ll be able to use a springbar with a 0.8mm tip (common with the flanged variety), but not one of the diver springbars with the 1.1mm tip. I’d really have liked to use the more robust style springbars.

Final thought is that it’s a well made case and worth putting in a build you care about.