Casio G-SHOCK Limited Watch GA-B2100BBR-1AER

Introducing the Casio G-SHOCK GA-B2100BBR-1AER, a limited edition GA-2100 that takes the GA-2100 formula further with Tough Solar charging and Bluetooth connectivity, all wrapped in a striking dark aesthetic. The octagonal resin case is finished in matte black throughout, with "G-SHOCK" embossed in relief on the top bezel and "PROTECTION" on the lower section. The dial features a dark anthracite textured finish with rectangular applied indices that almost disappear against the background in low light, creating the stealth effect that has made this family legendary. The main hands are long and silver-toned with luminescent fill, standing out sharply against the dark dial. The subdial at 9 o'clock is the most visually striking element: a bold red hand sweeps over concentric black rings, delivering the sole analogical burst of color. At 4 o'clock, the digital display glows in a vivid magenta or fuchsia tone, showing crisp digits alongside ALM and SIG indicators. The right side carries the LIGHT and START pushers, while the left side features ADJUST and MODE, all cleanly integrated into the resin structure.

Powering this watch is Casio module 5689, an ana-digi caliber combining analog hand movement with a digital display. Tough Solar charging harvests energy from any light source to keep the rechargeable CTL920 battery topped up. Bluetooth connectivity pairs the watch with the G-SHOCK Connected app for automatic time adjustment, world time zone management and alarm customization. The red subdial at 9 displays a second time zone (World Time). Functions include world time across 38 time zones and 38 cities, 5 daily alarms, 1/100-second chronograph up to 24 hours, countdown timer, auto calendar, solar charge level indicator and power-saving mode. Water resistance reaches 200 metres, suitable for swimming and intense water activities.

G-SHOCK was born in 1983 from engineer Kikuo Ibe's obsession with creating an unbreakable watch. After months of failed attempts, the floating module structure suspended inside resin survived 10-metre drops and extreme impacts. Since then, G-SHOCK has been worn by military personnel, rescue workers, athletes and collectors worldwide. The GA-B2100 is the modern evolution of the GA-2100, the reference that shook the watch world in 2019 with its octagonal silhouette evoking high-end Swiss luxury watches, yet with an urban soul and accessible price. This limited BBR edition adds solar charging and Bluetooth to the original DNA, completing a technical and aesthetic proposition that is hard to beat in its category.

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Technical Specifications

Reference: GA-B2100BBR-1AER
Module/Caliber: 5689
Type: Analog-Digital
Movement: Solar quartz (Tough Solar)
Water Resistance: 200 metres
Shock Resistance: Yes, Carbon Core Guard structure
Case Material: Resin
Case Color: Matte black
Strap Material: Resin
Strap Color: Black
Dial Color: Dark anthracite with magenta digital display
Crystal: Mineral
Illumination: LED
Diameter: 45.4 x 48.5 mm
Thickness: 11.9 mm
Weight: 52.0 g
Functions: World time (38 zones, 38 cities), Bluetooth, G-SHOCK Connected app sync, 5 alarms, 1/100-sec chronograph (24 h), countdown timer, auto calendar, solar charge indicator, power saving, analog second time zone
Battery: CTL920 (solar rechargeable)
Made for: Men

User manual

Download the manual in English (PDF)