Casio G-Shock [GMC-B2100BT-1ADR]

A collection of full-metal descendants of the first-ever G-SHOCK — introducing the GMC-B2100 with a black bezel highlighting their iconic form.

The striking two-tone black-on-silver color scheme projects G-SHOCK toughness in a model sure to suit your personal style. 

The top bezel of the GMC-B2100BT is treated to a hairline finish, exuding the premium elegance of sophisticated metal texture. Indexes finished in silver-colored vapor deposition enhance visibility and add a beautiful contrast with the dial.

Crafted from stainless steel, the bezel undergoes meticulous processes of forging, cutting, and polishing to achieve an exquisite finish of depth and dimension. To achieve the same original G-SHOCK shock-resistant structure in a full-metal timepiece, buffering components made of fine resin are inserted between the stainless-steel bezel and case. And dimpling is applied to metal band pieces to reproduce the look of the very first G-SHOCK resin band design. 

And the fact that the watch is crafted at Yamagata Casio, the “mother factory” where the first ever G-SHOCK was made, brings the whole design full circle. 

Dimensions & Build
Case Size: 51.3 × 46.3 × 12.4 mm
Weight: 171 g
Material: Stainless steel case and bezel
Band: Stainless steel band with a solid structure and one-touch 3-fold clasp
Glass: Mineral Glass with Neobrite for enhanced visibility in low light
Back Plate: Screw lock back
Band Size Compatibility: 150–205 mm
Water Resistance: 200 meters
Construction: Shock Resistant

Power & Battery
Power Supply: Tough Solar (solar-powered)
Battery Life: 7 months on rechargeable battery (normal use), 18 months in total darkness with Power Saving mode
Energy Saving Features: Power Saving (display goes blank to conserve energy in the dark), Battery Level Indicator

Smartphone Link & App Features
Bluetooth® Connectivity: Links with smartphones for advanced functionality
App Compatibility: CASIO WATCHES app
Features: Auto time adjustment, easy watch setting, access to approximately 300 world time cities, time & place logging, reminder notifications, phone finder

Key Features
World Time: 38 time zones (38 cities + UTC), daylight saving on/off, auto summer time switching, home city/world time city swapping
Stopwatch: 1/100-second precision (first 60 minutes), measuring capacity: 00'00''00–59'59''99 (first 60 minutes), 1:00'00–23:59'59 (after 60 minutes), modes: elapsed time, lap time, split time
Countdown Timer: Range from 1 second to 60 minutes, measuring unit: 1 second, adjustable in 1-second or 1-minute increments
Alarms: 5 daily alarms, hourly time signal
Lighting: Double LED light with super illuminator for the analog face and digital display, selectable illumination duration (1.5 or 3 seconds) with afterglow, color: white
Calendar: Full auto-calendar (to the year 2099)

Timekeeping & Accuracy
Analog Display: 3 hands (hour, minute (hand moves every 10 seconds), second), 3 dials (mode and battery, dual time/stopwatch/countdown timer/alarm hour and minute, day)
Day indicator
Additional Features: Hand shift (moves hands for an unobstructed view of the digital display), date/month display swapping, day display with six selectable languages
Time Format: 12/24-hour
Accuracy: ±15 seconds per month (without mobile link function)