The SKX Diver at 42mm — Seiko NH and Swiss Movements in One Case.
The Diver Watch Case 42mm is our SKX007-spec dive case, engineered to take two very different movements: the full range of Seiko NH calibers, and high-end Swiss movements — the ETA2893 and Sellita SW330. One case body, two build routes.
It keeps the submariner-style crown guard and SKX silhouette modders know, and it fits every one of our SKX007 mod parts — chapter rings and aftermarket parts. The screw-down crown and caseback are unique to this case and come included.
Supplied as a donor case body and rated to 200m, so you choose the bezel, insert, crystal and chapter ring that suit your build.
Two movement families, one case body.
Run a Seiko NH build, or step up to the Swiss ETA2893 or Sellita SW330 — the matching gold movement spacer and caseback come with that selection. Few aftermarket cases take both.
SKX007 proportions, 22mm lugs.
Diameter 42mm, lug-to-lug 45.5mm, 22mm lugs. Full-size SKX007 presence with a submariner-style crown guard.
Fits every SKX007 mod part we make.
Our SKX007 chapter rings and aftermarket parts fit as tested, alongside our 28.5mm dials and hands. Tested on our own parts.
Seiko NH or Swiss ETA2893 / SW330.
NH35, NH36, NH37, NH38, NH39, NH70 and NH71 fit directly. For a Swiss build, the ETA2893 or Sellita SW330 seats on a dedicated gold movement spacer with its own caseback.
Built to dive.
200m / 20 ATM. Screw-down crown and screw-down caseback — both included, both unique to this case.
Heads up — sold separately
Bezel, insert & crystal. Selected from the options on this page — pick your rotating (or fixed) bezel, the insert, and your sapphire crystal to suit the build.
Chapter ring. A SKX007-spec chapter ring seats the dial at the correct height. Browse compatible chapter rings .
Dial, hands & movement. The face, hands and engine are chosen separately. Match the dial and hands to your movement (date / day-date / no-date).
Your screw-down crown and caseback are already included — they’re unique to this case and aren’t sold elsewhere.
Casebacks are NOT interchangeable between NH and ETA2893 / SW330
Each caseback is threaded to a different height to match its movement. Fitting an ETA2893 / SW330 caseback onto a case running an NH movement will damage the NH movement. Always match the caseback to your movement.
The ETA2893 and SW330 are expert-level builds. They run a fourth hand and leave roughly 40% less clearance between the hands than an NH caliber, so hand-setting is far less forgiving. Unless you’re a seasoned modder or a certified watchmaker, we’d steer you to the NH route.
Dimensions
Materials & Finish
Compatibility
Water Resistance
This is a donor dive case body. Choose the bezel, insert, crystal and chapter ring on this page, then add the dial, hands and movement to finish the build.
What's already in this purchase:
The case body, your chosen caseback, the screw-down crown (unique to this case), bezel click spring, caseback gasket, crystal gasket and two fat spring bars. For an ETA2893 / SW330 build, a gold movement spacer is included with that selection.
The 5 parts you'll need for a complete watch:
Optional finishing touches:
Once your parts arrive, see the How To Mod tab for assembly tutorials.
Bezel, bezel insert, crystal, chapter ring, dial, hands and movement are selected separately to complete your build.
All photos of watches with modification parts are for illustration purposes only and are not included with the case purchase.
Everything worth knowing before you build.
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