CASIO
G-SHOCK GAB2100CD1A4 (LIMITED)
G-SHOCK GAB2100CD1A4 (LIMITED)
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Casio G-Shock 2100 Series - Model GAB2100CD1A4
The GAB2100CD1A4 is a special edition G-SHOCK 2100 Series watch, created in collaboration with the Charles Darwin Foundation. This eco-conscious timepiece pays tribute to the unique wildlife of the Galápagos Islands, with design inspirations drawn from the Galápagos marine iguana.
Design Overview
This G-SHOCK 2100 Series model is inspired by the Galápagos marine iguana, the world's only swimming iguana. The two-tone red and black colorway represents the iguana’s natural hues. The case back is engraved with the Charles Darwin Foundation logo, and the band features the Spanish message:
"Apoyo la conservación de Galápagos" (“I support Galápagos conservation”).
This collaboration supports environmental conservation efforts, making it an ideal watch for those who value sustainability and style.
Key Highlights
✔ Eco-friendly bio-based resin case & band
✔ Tough Solar charging for sustainable energy use
✔ Carbon Core Guard Structure for extreme durability
✔ Bluetooth connectivity with smartphone sync
✔ LED backlight with Super Illuminator for night visibility
✔ 200-meter water resistance for adventure readiness
Features
Case & Band
- Case Dimensions: 48.5 × 45.4 × 11.9 mm
- Material: Carbon / Bio-based resin
- Band: Bio-based resin band
- Weight: 52 g
Durability
- Shock Resistant (Carbon Core Guard Structure)
- Water Resistance: 200 meters
Exterior
- Glass: Mineral glass
- Other: Neobrite for enhanced visibility
Smartphone Connectivity
- Bluetooth®: Wireless linking to adjust time automatically
-
CASIO WATCHES App:
- Auto time adjustment
- Easy watch setting
- World time for 300 cities
- Time & place logging
- Reminder function
- Phone finder
Timekeeping
- World time: 38 time zones (UTC + city display), daylight saving auto-switch
- Analog: Hour, minute (hand moves every 20 sec)
- Digital: Hour, minute, second, am/pm, date, day
Timers & Alarms
-
Countdown Timer: 1 second to 60 minutes
-
Stopwatch:
- 1/100-second precision (first 60 minutes)
- 1-second increments (after 60 minutes)
- Measuring capacity: 23:59'59.99"
- Lap/split timing
-
Alarms: 5 daily alarms + hourly time signal
Lighting
-
Double LED Light:
- Super Illuminator for the face & digital display
- Selectable illumination duration (1.5s / 3s)
Battery & Power
- Tough Solar: Solar-powered battery
- Power-saving mode: Display turns off when not in use
-
Battery Life:
- 7 months (normal use after full charge)
- 18 months (stored with power save mode)
Other Features
- Hand shift function: Hands move away for unobstructed digital reading
- 12/24-hour format
- Full Auto-calendar (until 2099)
- Battery Level Indicator
- Mute Feature: Button tone on/off
Summary
The GAB2100CD1A4 is a sustainably-designed, rugged, and stylish G-SHOCK watch that blends eco-conscious materials with cutting-edge features. Designed in partnership with the Charles Darwin Foundation, it honors Galápagos conservation efforts while delivering the legendary toughness of G-SHOCK.
Ideal for outdoor explorers, environmental advocates, and watch enthusiasts who appreciate unique collaborations and bold aesthetics.
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 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.