DIY Watchmaking Kit | 42mm Dive Watch with D03 Black Dial & CTS FKM Rubber Strap (TMI NH35 or NH70 movement):
A clean, classic diver build: a matt black D03 dial with bright BGW9 lume, paired with our soft CTS FKM rubber strap. Powered by the reliable TMI NH35 automatic movement, visible through the exhibition case back.
The DIY kit includes:
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Complete components of one 42mm Diver series mechanical watch
Watch Case: 42mm DWC Diver Case - Classic Bezel variant
- Material: SS316L Stainless Steel
- Crystal: Sapphire double dome (with Anti-Reflective Coating)
- Case size: 41.5mm (41.5mm bezel, 41mm body)
- Lug size: 22mm
- Lug-to-lug: 47.5mm
- Thickness: ~14mm
- Water-resistant: 20ATM (assuming correct assembly)
- Crown: Screw-down
Case Back: Stainless steel Exhibition case back (Hardened Mineral Crystal) Chapter Ring: CR-01-NH Brushed stainless steel with Black Markers Bezel:
41.5mm DWC Classic Bezel (Stainless Steel) Bezel Function: unidirectional 60-click (3-pronged click spring) Bezel Insert:
39.4mm DWC Stainless Steel Diver Bezel Insert with Japan BGW9 SuperLume markers (Black - Type A) Watch dial: 28.5mm DWC D03 Black Sandwich Dial (full dial) with Japan BGW9 Superlume
Hands: Silver Diver Hands with Japan BGW9 Superlume (TMI NH Series) Movement: TMI NH35 automatic movement Strap: 22mm DIY Watch Club CTS FKM Rubber Strap (Black) - with strap tool - Watchmaking tool options:
- DWC Essential tools for this experience
- DWC Professional watchmaker tools with Box upgrade
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No tools - for those who already have watch repair tools. Please make sure you have hand removal tools and hand-setting tools (usually not included in watch repair kits)
- Complete video instructions (3 Languages - English, Cantonese and Mandarin)
Time required:120~ mins (Simply enjoy the watchmaking process at your own pace)
Mod potential:★★★★★ (With huge potential for modding due to Watch Mod compatibility. Details below)
Difficulty Level: ★★★★ (without the new second hand installation tool)
- Key challenge: second hand installation
Difficulty Level: ★★★ (With the new second hand installation tool. Details below)
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We made the hardest step much easier!
We know. Installing that second hand for the first time can seem a little daunting. That's why we spent a year to invent this second hand installation tool for everyone.
DWC PRO WATCHMAKING TOOL KIT:

This is our Pro Tool Kit, a DWC in-house design from top to bottom. This is a lot more than a mere step up from standard Amazon watch-making tools; it is a collection of tools we designed and crafted to give you the best watchmaking experience possible.
And in watchmaking, just like many other crafts, the quality of the tools does affect the quality of the outcome.
Learn more about it here: DIY Watch Club Pro Watchmaking Tools Set
MOD COMPATIBILITY:
This dive watch is partially compatible with Watch Mods. For detail please check out our blog post here:
https://diywatch.club/en/blog/parts-compatibility-for-seiko-mod
MODDING SUGGESTIONS

A TMI made original rotor with Côtes de Genève finish, customized by us. A perfect icing on the cake for the watch you assembled yourself or a mod you are proud of. Best paired with an exhibition case back. Design your custom rotor