Casio W-800h Mod

The module (3524 or 3298) features a dedicated dual-time zone. This makes the W-800H a perfect base for a "GMT" style mod—a poor man’s Explorer II.

The crystal on the W-800H is made of acrylic (plastic), which scratches easily.

Locate the specific solder bridge/jumper on the back of the PCB (often labeled near the jumper pads).

The most popular Casio W-800H modification is unlocking the countdown timer. Casio uses the same internal module (Module 3223) for multiple watch models. To save manufacturing costs, they simply disabled the timer feature on the W-800H by adding a tiny solder bridge on the circuit board. Removing this bridge brings the feature back. Tools Needed Micro Phillips-head screwdriver (size #00 or #000) Fine-tipped soldering iron or a sharp hobby knife Magnifying glass or loupe Step-by-Step Instructions casio w-800h mod

: Similar to the timer mod, this involves shorting or opening specific "jumper" pads on the PCB.

4/10 (Drop-in) | Cost: $80 - $120 This is the most advanced and rewarding mod. Several aftermarket companies (most notably SKXMOD and occasional eBay sellers) produce full metal cases and bezels specifically for the W-800H module.

: Peel off the original polarizing film from the LCD and replace it with a new sheet rotated 90 degrees. The module (3524 or 3298) features a dedicated

Do you have with soldering or handling small electronics?

: Once the timer is unlocked, users can even enable an auto-repeat function by pressing the light button during setup, though the

The Casio W-800H module has become a popular choice among watch enthusiasts and DIY enthusiasts due to its ease of modification. Some common modifications include: Locate the specific solder bridge/jumper on the back

The most significant "internal" mods involve manipulating the solder jumpers on the watch's PCB to enable features Casio disabled for market segmentation.

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The forum had warned about this. “Some cases need a shim behind the module.” Leo cut a square from an old credit card, slipped it in. The module sat higher now. The pushers clicked. He fitted the new case back—screw-down, metal—and tightened it with a pair of needle-nose pliers because he didn’t own a proper case wrench.

Utilizing NATO strap adapters to change the look and feel of the watch.

He cleared the kitchen table. His girlfriend, Maya, looked up from her laptop. “Are you… performing surgery?”