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Diver Watch Case - 38mm - SKX013/Submariner Edition (Fits NH & GMT Movements)

Fit Movement

ONLY 8 main components are needed to complete a watch.
Watch Case
Bezel Insert
Chapter Ring
Rotor (optional)
Movement Holder (optional)
Tweezer (optional)
**All components can be selected above. If non-rotatable bezel is selected, bezel insert is not required.

Made exclusively for us with quality assurance by ISO 9001 Certified manufacturers.



GMT WIS are going to love this!

After almost a year of prototyping and as always, we are the first and proud to present to you a one of a kind diver watch case in the market that can fit both Japanese Seiko NH movements (NH35, NH36, NH37, NH38, NH39, NH70, NH71), Swiss ETA2893 and Sellita SW330 GMT movements. This watch case design will undoubtedly opens up a myriad of breathtaking opportunities for customisations.

This is also one of the first aftermarket case designed to fit high-end Swiss GMT mechanical movement, ETA2893 and Sellita SW330.

Designed uniquely with a submariner crown guard while retaining characteristic of an SKX.

That's right! This case fits ALL our SKX013 mod parts!! (Refer to FAQ below)

Water resistant to 200m.

Build your own watch from scratch!

This is 38mm case.
For 42mm case, visit here

***Read FAQ below for more details.

This 38mm diver watch case comes complete with:
  • 1x Case Body
  • 1x Bezel Click Spring
  • 1x Caseback (Solid or sapphire)
  • 1x Caseback gasket
  • 1x Crown
  • 1x Crystal Gasket
  • 2x Fat Spring Bars
  • 1x GMT Movement Spacer (If GMT movement is selected)
    1. Quality Swiss Production Quality, ISO 9001 Certified
    2. Case Material 316L Stainless Steel
    3. Case Diameter 38mm
    4. Case Thickness 9.9mm (Without bezel and crystal)
    5. Case Length 44.5mm
    6. Lug Width 20mm
    7. Caseback Screw down (Solid, Mirror polished or See-thru Sapphire)
    8. Crown Screw down
    9. Water Resistant 200m / 20atm
    10. Fit Movements NH35, NH36, NH37, NH38, NH39, NH70, NH71, ETA2893, SW330
    1. 1x Case Body
    2. 1x Bezel Click Spring
    3. 1x Caseback (Solid or sapphire)
    4. 1x Caseback gasket
    5. 1x Crown
    6. 1x Crystal Gasket
    7. 2x Fat Spring Bars
    8. 1x GMT Movement Spacer (If GMT movement is selected)

    All photos of watches with modification parts are for illustration purposes only and are not included with the selected modification part 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
    1. Does this watch case fit SKX013 aftermarket parts?
      Yes, only to our own SKX013 aftermarket parts since we have tested it. However, the two parts that are non-interchangeable and unique to this case are the crown and caseback, which are provided with this case.
    2. Is caseback for NH and ETA2893/SW330 GMT movements interchangeable?
      No, casebacks are NOT interchangeable. GMT movement is significantly smaller and slimmer than NH movement, its caseback is therefore significantly thinner than NH caseback.

      **Using GMT caseback on a case fitted with NH movement will inevitably damage the NH movement! Please ensure that you select the proper caseback for its respective movement.
    3. How is NH movement fitted into the watch case?
      NH movements can be fitted into the watch case directly without any addition GMT movement spacer. A unique NH caseback is required to secure and close up the watch case.
    4. How is ETA2893/SW330 GMT movement fitted into the watch case?
      A unique GMT movement spacer (gold colour in the photos) is required to encase the GMT movement inside the watch case. Thereafter, another unique caseback specifically for this movement is require to secure and close up the watch case.
    5. I have bought the NH movement version of this case. But I want to fit an ETA2893/SW330 GMT movement into it now.
      Too easy. You just need to purchase the GMT movement caseback and spacer separately, which you can select on this product page. That would allow you to fit GMT movement. Likewise, you can purchase NH movement caseback separately.
    6. Will your dial collections fit ETA2893/SW330 GMT movement?
      Yes and no. No because the dial legs are designed for NH movements. So current dial collections with NH dial legs will not fit into GMT movement. Furthermore, the date windows do not align between both movements. On the bright side, yes, it can still fit (only no date dials), but requires you to remove all the dial legs and manually align and adhere with adhesive (e.g. double-sided tape). We will release GMT movement-specific dials next year.
    7. Do you have ETA2893 or Sellita SW330 movement?
      Coming next year.
    8. Do you have ETA2893 or SW330 movement hands?
      Coming next year.
    9. Do you have bracelets for this watch case?
      We will be releasing our own selections of bracelet for our watch case in first half of 2021. Meanwhile, this case has lugs designed exactly like SKX013. Hence, OEM SKX013 bracelets can fit this watch case. We can only guarantee OEM SKX013 bracelets will fit. For aftermarket bracelets for SKX013, it may or may not fit. You will have to check with the respective retailer you purchased from.
    10. Hands installation on ETA2893/SW330 movement is more difficult than NH movements.
      Correct. Compared to NH movement, it is extremely difficult. ETA2893 and Sellita SW330 movements are smaller, slimmer and have about 40% lesser space between the hands as compared to NH movements. What's more, within the 40% lesser space, you need to fit 4 hands (hour, minute, second, GMT) instead of 3 hands (hour, minute, second). This makes your margin of error very tight when it comes to hands installation. Just take hour and minute hands spacing for example; On NH movement, there is 0.6mm space, while on ETA2893/SW330, there is 0.4mm space.

      **Unless you are an extremely experienced modder or a certified professional watchmaker, we do not recommend any individual to work with GMT movements.

Customer Reviews

Based on 22 reviews
Andy C. (Hobart, AU)
Using this mod part for: SKX013

Great case and perfect for a first mod. Adriel was great, friendly and answered lots of questions. Thanks!

MARK J.G. (Bordon, GB)
Using this mod part for: SKX013 39mm is the key
38mm Diver ETA GMT

Not a simple build and my friend is a watch maker, so I hope this helps.
I had intended to use a White Birch dial, but the texture and it's thickness won't allow a GMT hand to work. Switching to another dial and we find that the sweep of the GMT hand needs to be inside the Indices, if the hands are all tilted up to clear, the second hand hits the crystal. Final hurdle is that with the ETA 2893 movement, the case back won't go home, so needs some taking off the chapter ring or the supplied silver movement ring.
But...what a result.
38mm GMT with a Suisse chronometer grade movement in a Mods.
Thank you Adriel.

Filippo T.
Using this mod part for: Skz013 case with eta 2893-2 gmt
Gmt build

Grate case waiting all the parts for the ETA 2893-2 gmt

Truls H. (Bergen, NO)
Using this mod part for: Most models 👌
62Mas Submariner

Super nice case and love the quality feeling 👌

D P. (Austin, US)
Using this mod part for: LA built 38 mm Sub

Lucius Atelier never disappoints. All LA parts and assembled as well. I'd been wanting a DrNo type watch and LA made it happen.

RYUSUKE K. (Hamanocho, JP)

Diver Watch Case - 38mm - SKX013/Submariner Edition (Fits NH & GMT Movements)

Jayme H. (Calgary, CA)
Using this mod part for: NH36 build
Great case

Very nice case, all the parts fit together quite well, paired with a Lucius Atelier Snowflake Submariner dial and a Namokimods black OSM style ceramic bezel. Very happy with the quality. Thanks!

Faraj H. (Manama, BH)
Beyond my expectations.

Quality finish , fantastic look and feel. And delivered so quickly.

Henry O. (Al Ain City, AE)
Using this mod part for: SK013
Good quality looks better in person

Perfect for my small wrist and fast delivery too. Will definitely buy again this friendly seller

Gabriel P. (Greenwich, GB)
Using this mod part for: Skx013
Lovely case

I was tworn in between this case from Ariel and another skx013 case from a competitor and I'm glad I went with this one . Perfect case , all skx013 parts fitted nicely.