|work|: Casio W-800h Mod

A: Selling a modified watch as "new" is trademark infringement. Selling your personal mod on r/Watchexchange as a "custom build" is generally fine, as long as you disclose it is not authentic Casio after the mod.

(very popular)

(usually the black resin version, ~$20–25) casio w-800h mod

Use a fine-tipped soldering iron and copper wick to remove the factory solder bridge. A: Selling a modified watch as "new" is