Casio G-Shock Ga-B2100-1AER G-Shock Black Tough Solar Powered Combination Watch
A carbon-reinforced resin G-Shock with a compact 48.5 x 45.4 x 11.9mm case and octagonal bezel featuring a round black dial with grey markers. The watch combines analogue and digital displays with dual illuminator and Neobrite coated hands for low-light visibility. Water resistance extends to 200 metres, suitable for regular water exposure and snorkelling.
The rechargeable solar battery eliminates conventional battery changes. Functionality includes five daily alarms with hourly signal, world time, stopwatch, auto calendar, date and weekday display, and Bluetooth connectivity with phone finder capability. The mute function allows silent operation. The black resin strap and case provide durability for active use, whilst accents of yellow, blue, and red detail complete the design.
The Casio G Shock GA-B2100-1AER is listed on WatchShopper as a carbon-reinforced resin solar watch with a black dial, a date display, a world time display, an alarm, and 200 m water resistance. It comes on a black resin strap. On 22 October 2026 the lowest UK price was £129.00 at Argento, in stock, with free delivery and 30-day returns. 2 UK retailers have it in stock, all at £129.00. That is above its 199-day tracked average of £118.62.
WatchShopper has tracked the Casio G-Shock Ga-B2100-1AER G-Shock Black Tough Solar Powered Combination Watch across 4 UK retailers for 199 days. In that time the lowest recorded price was £103.20 at Argento on 5 April 2026, and the highest was £129.00 at Argento. The average tracked price is £118.62. At £129.00, the current best price is above its tracked average.
| Lowest tracked price | £103.20 |
|---|---|
| Highest tracked price | £129.00 |
| Average tracked price | £118.62 |
| Current best price | £129.00 |
| Tracking since | 5 April 2026 |
60% of the 209 Casio watches we track cost less than this one. This is the 49th cheapest of the 101 versions of the G Shock we list.
