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GS Watch Case - 36mm

Caseback (Fits Movement Types)


Version 2 is available here.

Important Note: In order for bracelet to be universally compatible with our oyster bracelet, final GS case will NOT have drilled through lug holes. The blue protector film on the crown is removable. Photos will be updated after the new year. Thank you.

ONLY 4 main components are needed to complete a watch.
Watch Case
Movement Holder (optional)
Tweezer (optional)


  • For the watch case, select your (1) Case, then (2) Bracelet (optional), and lastly (3) Caseback (To fit different types of movements).
  • For a complete watch, select your (4) Dial, (5) Hands and (6) Movement.
  • To have watch assembled, select (7) 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 First and Exceedingly High Quality GS Case designed after Limited Edition Grand Seiko SLGH003!

Comes complete with double domed clear AR sapphire, caseback (solid or sapphire), screw down crown with optional solid brushed oyster bracelet.

Designed to fit all of our dials (28.5mm) and original NH movements (grey dial holding spacer). Additionally, case has ability to fit ETA2824/SW200/SW260 and ETA2893/SW330 movements. Special spacer and caseback provided.

The bracelet clasp is also designed to have micro-adjustment without the need for removing or adding links.

Watch case has a water resistant of 200m.

This watch case is 36mm.
For 39mm, visit here
    1. Quality Swiss Production Quality, ISO 9001 Certified
    2. Case Material 316L Stainless Steel
    3. Case Diameter 36mm
    4. Case Thickness 12.8mm
    5. Bracelet Width 20mm taper to 18mm
    6. Lug to Lug 43mm
    7. Lug Width 20mm
    8. Crown Screw down
    9. Crystal Double Domed Sapphire with Clear Anti-Reflective Coating
    10. Crystal Size 29.5mm x 1.5mm x 3mm
    11. Water Resistant 200m / 20atm
    12. Fit Movements NH35, NH36, NH38, ETA2824, ETA2893, SW200, SW260, SW330
    1. 1x Watch Case (Inclusive of sapphire and crown)
    2. 1x Oyster Bracelet (Depends on selection)
    3. 1x NH Sapphire Caseback (Depends on selection)
    4. 1x ETA2824/SW200/SW260 Movement Spacer (Depends on selection)
    5. 1x ETA2893/SW330 Movement Spacer (Depends on selection)
    6. 1x ETA2824/SW200/SW260 Sapphire Caseback (Depends on selection)
    7. 1x ETA2893/SW330 Sapphire Caseback (Depends on selection)

    All photos of watches with modification parts are for illustration purposes only and are not included with modification parts purchased.

  • Recommended Mods With:

    1. Swiss Super-LumiNova® BGW9 Hands
    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 21 reviews
Z. (Kampong Pasir Ris, SG)
Probably the best non-Explorer style 36mm case (3.5/5)

I was very lucky to get one of the last GS36 V1 cases.

- Looks really nice, I especially like the sharp, angular edges on the lugs that I feel are missing from V2
- Relatively simple mod, mostly just plug-and-play

- Has the tightest screwdown crown I've ever had - any deviation from 'perfect' alignment of crown stem and case will result in the crown being nigh impossible to use with bare fingers - a tiny application of Silicon Grease (for gaskets) alleviated the issue, but crown is still extremely tight. Most aftermarket crowns have no such issue, I really hope V2 has addressed this issue.
- Did not come with springbars
- AR coating could've been better - it's still very reflective and I feel a simpler flat or inner-domed crystal may have alleviated the issue.

- Aesthetically I prefer this over the Explorer case and the GS36V2, because it offers something more 'unique'
- Design would be perfect with perhaps a better crown with more 'wiggle room' like most aftermarket crowns, and perhaps being 'taller' larger fingers could grip it.

Conrad Costa (Chelmsford, GB)
Using this mod part for: GS aftermarket
GS case

Great case for a dress style watch
No chapter ring needed
Great finish with matching crown

Andrew Frazee (Asheville, US)
Using this mod part for: Aftermarket
White Birch Build

Great quality pieces, all fit NH movements

Using this mod part for: LA GS 36mm case
Great Case, but hopefully V2 will be perfect

This is a gorgeous case, the brushing and polishing are top notch! Yes, it is a little chunky compared to the 36mm explorer, but the Grand Seiko this case is based on is not exactly slim, so absolutely no complaint there. The only thing I hope to see in a second version is the relocation of the lug holes. This was a bit disappointing as the stock photos have the lug holes in a completely different location. I understand the website says they will not be drilled, but there is a difference between not being drilled though, and being in a different location. If a V2 comes out with this change, I would buy it in a heartbeat. All said though, I am happy as always with my purchase for Adriel. This is an amazing case for my Grand Seiko Kirazuri homage.

Andrew Wetmore (Surrey, CA)
Using this mod part for: NH36- based watch.
Perfectly executed case

I only received this case today and have already assembled a watch. The case is perfect. Clearly no shortcuts weee taken in the design of this case and it is built with attention to detail.

S.R. (East Hampton, US)
Love my GS-inspired build!

Combined the GS-style 36mm case, dauphine hands, and a NamokiMods Sakura Navy dial for this build which I really love.

Gnadai (Kihei, US)
Using this mod part for: Gs case
Amazing finishing

The case is very finely finished and very easily put together, it made a very beautiful watch for my wife. However as mentioned in other reviews the lug holes are drilled very close to the edge which concerns me on the durability of the lugs, so far so good. If I do have a problem I will edit this review. :)

Pranay Mantha (Brisbane, AU)
Using this mod part for: Aftermarket case and parts
GS case

I got the 36mm case and bracelet. The case is gorgeous. Just waiting on a special dial before I complete the build! The bracelet is okay - the fit with the case is precise, but I personally don't think the design works as qellt.

D.K.(.N. (Greenwich, GB)
Using this mod part for: Aftermarket GS36mm Case
Premium 36mm Case

I can without a doubt vouch how gorgeous this case is. Used this for Grand Seiko homage build. The brushing and polishing balance of this case is flawless for the 36mm. It appeared small when unbuilt, but once the dial And leather strap is put on, it perfectly on the wrist (my wrist is 6.75inch).

Would love to you a version #2 with fully polished bezel and brushed sides

비웅(Biung) 김(Kim) (Yangju, KR)
It's cool, but it's a bit disappointing.

I always wanted to have Grand Seiko.
I couldn't afford it, so I found this product and decided to make it into a White birch

I made it cheaper than I thought.
In many ways, it's a bit disappointing.
Overall, polishing and brushing are good,
Burr near the rug hole is too much.

It's my personal opinion.
I hope you pay more attention to the quality.
I think it would be nice if the price was cheaper.