Japan Treasure Factory
Casio G-SHOCK GBM-2100A-2BJF — Blue Dial Metal Bezel Bluetooth Tough Solar
Casio G-SHOCK GBM-2100A-2BJF — Blue Dial Metal Bezel Bluetooth Tough Solar
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G-SHOCK GBM-2100A — Metal Bezel, Blue Dial
ANALOG-DIGITAL / 2100 Series / Released August 2025
The GBM-2100A keeps the slim silhouette that defines the 2100 series while adding a metal bezel, smartphone link, and Tough Solar power. The case and band's main resin parts use biomass plastic for a more environmentally conscious build. The dial gets a vapor-deposited blue finish with silver vapor-deposited indices for a design that moves easily from casual to business settings. The stainless steel bezel and glass-fiber-reinforced resin inner case protect the module, with the iconic octagonal bezel shaped through forging, cutting, and polishing — circular hairline finished on top, mirror polished on the sides.
Bluetooth connects to the CASIO WATCHES app for automatic time correction, world time for approximately 300 cities, Time & Place location logging, reminders, and phone finder, all backed by stable Tough Solar power and a double LED light for after-dark visibility.
Specifications
| Model | GBM-2100A-2BJF |
| Series | G-SHOCK ANALOG-DIGITAL / 2100 Series |
| Case size | 49.3 × 44.4 × 11.9 mm / 1.94 × 1.75 × 0.47 in |
| Weight | 72 g / 2.5 oz |
| Case / bezel material | Resin (biomass plastic) / stainless steel |
| Band | Resin band (biomass plastic) |
| Glass | Mineral glass |
| Water resistance | 20-bar (200-meter) |
| Structure | Shock resistant |
| Time correction | Bluetooth (auto time correction via smartphone) |
| Power source | Tough Solar |
| Other | Neobrite luminous material |
| Mobile Link / App | CASIO WATCHES app — auto time correction, easy watch setting, world time (approx. 300 cities), Time & Place, reminders, phone finder |
| Functions | World time (38 cities / 38 time zones + UTC, auto DST, home city swap), Stopwatch (1/100-sec under 1 hr, 1-sec over 1 hr, 24-hr, lap/split), Timer (1-sec unit, max 60 min), 5 daily alarms + hourly time signal, Double LED light (dial + LCD backlight, Super Illuminator with afterglow, switchable duration), Full auto calendar, Operation sound on/off, Power saving function, Battery indicator, Hand retreat function, 12/24-hour format, Date display (month/day swap), Day-of-week display (6 languages) |
| Battery life | ~7 months (with functions) / ~18 months (power saving) |
| Accuracy | Average monthly deviation ±15 seconds (standard quartz accuracy when Bluetooth sync unavailable) |
| Band size | 145–215 mm |
| Release date | August 2025 |
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