CASIO
G-SHOCK GM2100BRW-1A
G-SHOCK GM2100BRW-1A
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Casio G-Shock G-Steel 2100 Series - Model GM2100BRW-1A
The Casio G-Steel 2100 Series introduces the GM2100BRW-1A, a bold and colorful design inspired by the original G-Shock’s iconic brick wall pattern. With its dynamic rainbow vapor deposition and robust construction, this model offers both style and toughness for those who push boundaries.
Design Overview
The GM2100BRW-1A stands out with its vibrant color-shifting rainbow vapor deposition and striking brick wall-inspired design. Its compact yet rugged build and eye-catching finish make it a unique accessory that performs under pressure.
Key Highlights
- Dynamic color-shifting bezel with rainbow vapor deposition.
- Inspired by the symbolic brick wall imagery of the original G-Shock.
- Tough and stylish resin and stainless steel construction.
Features
Case & Band
- Case Dimensions: 49.3 × 44.4 × 11.8 mm
- Material: Resin and stainless steel for lightweight durability.
- Band: Bio-based resin band for eco-conscious design.
- Weight: 72 g
Durability
- Shock-resistant construction.
- Water resistance: 200 meters, suitable for various water activities.
Exterior
- Glass: Mineral glass for scratch resistance.
- Surface Treatment: Black ion-plated bezel for a refined finish.
- Band Compatibility: Fits wrists 145 to 215 mm.
- Other Features: Neobrite coating for enhanced readability in low light.
Technology & Functional Highlights
Timekeeping
- World time: 31 time zones (48 cities + UTC), with daylight saving on/off.
- Dual time functionality for frequent travelers.
Timers & Alarms
- Countdown timer (up to 24 hours, with 1-second increments).
- 5 daily alarms and hourly time signal.
Lighting
- Double LED light:
- Super Illuminator for the face.
- LED backlight for the digital display.
Calendar & Accuracy
- Full-auto calendar pre-programmed until 2099.
- Accuracy: ±15 seconds per month.
Additional Features
- 1/100-second stopwatch (up to 1 hour, then 1-second units up to 24 hours).
- Button operation tone on/off.
- 12/24-hour time format.
Power & Battery
Battery Life
- Approx. 3 years on SR726W × 2.
Summary
The GM2100BRW-1A combines bold aesthetics with advanced functionality, making it a versatile timepiece for those who value both performance and unique design. Its eco-friendly band and colorful vapor deposition bezel highlight Casio’s innovative approach to sustainability and style.
For more details, visit the official Citizen website here.
Warranty:
- The watch is covered by a warranty, providing assurance and protection for your purchase.
▶︎Processing Time & Shipping Policy
▶︎We only carry G-SHOCK USA products.
▶︎Unfortunately, we DO NOT ship internationally.
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Explore Your Favorite G-SHOCK Watches
Explore our current selection of G-SHOCK watches. If you don’t see your preferred model, check the G-SHOCK USA website, note the model number, and contact us via email or phone(415-567-2400) to place your order. Ask about our special deals!
Please note:
- We only carry G-SHOCK USA products.
- Unfortunately, we DO NOT ship internationally.

Trusted Since 1967
Our owner, Asuka Saito, is certified by both Gemological Institute of America (GIA) and Cultured Pearl Association of America (CPAA), and we also have a GIA-certified appraiser on staff. Asuka is also a color specialist, certified as a TC Color Therapist and Sensational Color.