Key Features:
- Why it works: The W-800H has a dual-time function. You set the digital sub-dial to UTC (Zulu time). Then, you rotate a 24-hour bezel to track a third time zone.
- The Part: Look for 38mm to 40mm flat aluminum bezel inserts for SKX007 or Pagani Design watches. You may need to sand the inner diameter slightly.
- The Vibe: White dial with a black 24-hour bezel? That is a $14,000 Rolex Explorer II 16570 for a total cost of $30.
: Filling the watch case with silicone oil. This significantly improves legibility
You can ruin a W-800H and be out $18. You cannot say the same about a G-Shock. This low risk encourages experimentation.
In the world of watch modding, the Casio W-800H is an unlikely hero. For around $20 USD, you get a 100-meter water-resistant, 10-year battery digital watch. But for a growing community of modders, that’s just the starting point.
3240
Note: In module , removing the top-right jumper typically enables the timer Reddit .
- Remove spring bars and original strap with a spring bar tool.
- Clean case and mask the display, buttons, and caseback with tape.
- Lightly sand the bezel surface to improve paint adhesion.
- Apply primer, then 2–3 thin coats of paint, allowing full drying between coats.
- Apply clear coat for protection; let cure 24 hours.
- Reinstall custom strap.
The Casio W-800H has quickly become a favorite among watch enthusiasts and MODders, who appreciate its simplicity and versatility. The MODding community has been instrumental in keeping the spirit of the F-91W alive, with enthusiasts creating custom designs, swapping out straps, and even modifying the watch's internals to create one-of-a-kind timepieces.
Aesthetics (Voids/Case), Lighting (LED/Backlight), and Ergonomics (Straps).
When the community talks about a "Casio W-800H mod," they are rarely talking about changing the module. They are talking about three distinct categories: