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The GA-2100GB-1AER is Casio's slim 'CasiOak' G-Shock: an octagonal bezel, carbon core guard case and a 48.5 × 45.4 × 11.8 mm body that weighs 51 g. It carries the full G-Shock toolkit: shock resistance, 200 m water resistance, world time across 31 time zones, a 1/100-second stopwatch, countdown timer and Neobrite hands. It suits people who want a tough everyday watch with a dressier profile than a classic square G-Shock. Against analog G-Shocks like the GA-110 it is noticeably thinner and lighter, and against the metal-bezel GM-2100 it trades steel for a lighter resin build. Owners like the look and the light weight; the common complaints are the small digital display and the dark, low-contrast dial on this blacked-out version.
In stockShips from Hong Kong SAR China · priced in GBP (£90.41) · duties may applyReturn policy
Owners rate the GA-2100 line highly for its slim, light case and the octagonal look, and many wear it daily. Criticism centers on legibility: the digital window is small and the blacked-out dial is hard to read in low light.
The Casio G-Shock GA-2100GB-1AER is an analog-digital men's watch with a shock-resistant Carbon Core Guard structure. The case and bezel are carbon and resin, and the band is resin. The face is covered with mineral glass and has Neobrite markings.
It is water resistant to 200 meters. A double LED light with a Super illuminator lights both the face and the digital display, with white LEDs. The watch runs on two SR726W batteries, which last approximately 3 years.
World time covers 31 time zones (48 cities plus coordinated universal time) with daylight saving on or off. Other functions include a 1/100-second stopwatch, a 24-hour countdown timer, 5 daily alarms, an hourly time signal and a full auto-calendar to the year 2099. Button operation tone can be switched on or off.
