G-Shock GA-B2100 "CasiOak" Metal Conversion "Mod"

There are lots of conversion kits for GA-2100 watches and other variations of the wildly popular “CasiOak” watches. Be careful to assure that the kit you buy will be compatible with your specific version of the CasiOak. I found a kit which was compatible with the GA-B2100 which I converted. This is the item I bought. https://a.co/d/eqblsSN

I chose a Custom Oaks kit because the price was attractive and because I preferred the overall look. Some metal versions include a false crown on the right side of the case and I didn’t want that.

I decided that this conversion was preferable to other ready-made options from Casio with metal bezels and bracelets. Why? Because right now there are no metal “CasiOak” watches available with positive LCD windows. Even if I decided to buy the negative LCD (or “reverse LCD”) offerings direct from Casio I could have to pay $400 or more for them. Instead, I found a deal on the black GA-B2100 for just $99 and I bought the Custom Oaks conversion kit for an additional $109. Not bad.

The conversion work itself was quite simple and the kit I bought even came with two screwdrivers to help me complete the task. It was very easy to remove the watch’s original resin band thanks to quick-release springbars which are standard on these versions. I merely had to remove four small screws before I could easily remove the original resin bezel. After that, all I needed to do was press the module into place on the metal kit and use four of the provided, tiny screws to secure it.

After I had the watch module secured in the new, metal enclosure, I used the provided, tiny screwdriver to remove one link from the bracelet. The watch now fits my seven-and-a-half-inch wrist pretty well. It looks fantastic. The functions, including Bluetooth connectivity, are working perfectly and, of course, the watch case now looks remarkably similar to the cases of authentic Royal Oak watches.