Casio had to equip the “CasiOak” series with more modern features – the case has just a crazy fan community. As you can see, the “Octagon” goes the way of its square comrades, expanding the model range and pleasing the fans with wireless capabilities. So, if you were going to buy GA-2100 the other day, we advise you to postpone the purchase.
The GA-B2100 looks almost exactly like the GA-2100, even the dimensions are identical [except for thickness] which is as much as 0.1mm larger [11.9mm vs. 11.8mm for GA-2100]. According to the engineers, they were able to further optimize the layout on the board to cope with the increased number of parts due to the expansion of the functional base. In simple terms, the watch is much more functional while retaining its previous size.
Due to the more advanced module, the window at the 9 o’clock mark no longer displays the days of the week, but is a full-fledged indicator of modes and battery level. Above the “beveled numeric window” instead of the WR20 Bar inscription are the coveted TOUGH SOLAR and Bluetooth.
When connected to a smartphone via Bluetooth, you can adjust the time manually [plus auto correction 4 times a day], quickly adjust watch modes, select a world time zone [one of 300 cities on the map] and record your current location and time.
GA-B2100 Profile / Casio G-Shock
Average Amazon Price: $180 (yes, we may earn a commission on qualifying purchases from our links to Amazon). Check the Price on Amazon →
Year of first release: 2022
The most distinctive specs:
— Retro Look (inherits the design concept of the very first G-SHOCK)
— Carbon Core Guard structure (protects the module by enclosing it in a carbon case. The case is made of fine resin embedded with carbon fibers for outstanding strength and crack resistance)
— Solar-powered (CASIO’s original solar-charging system converts not only sunlight but also light from fluorescent lamps and other sources into power)
— CASIO WATCH App (you may manage all watch settings through your phone)
— Mobile link (Wireless linking using Bluetooth(R)) (for time sync with your phone data)
— 200-meter water resistance (good for swimming but not for deep diving)
Other colors and full specs: GA-B2100 Wiki Page