Casio G-Shock Classic Watch GM-2100CB-1AER

Introducing the Casio G-Shock GM-2100CB-1AER, the metallic evolution of the iconic GA-2100 that redefines the concept of sporty elegance. This version features an octagonal case with matte gunmetal ion-plated finish that masterfully contrasts with the textured black dial. The metal bezel carries engraved inscriptions "G-Shock", "PROTECTION", "MODE", "ADJUST", "LIGHT" and "START" in silver typography, while the crown and side pushers maintain the same gunmetal finish. Silver hands with luminous treatment stand out against the black dial, along with white rectangular indices marking the main hours.

At its heart beats the Casio module 5611, an analog-digital caliber that combines three central hands with a compact digital display located at the 3 o'clock position. This display shows day of the week, date and second time zone. The watch incorporates world time with 31 time zones, 1/100 second stopwatch, countdown timer, 5 daily alarms, hourly signal, automatic calendar until year 2099, power saving function and LED light. The black resin strap with cordura-type texture provides comfort and extreme durability.

The G-Shock series was born in 1983 from engineer Kikuo Ibe's dream of creating an unbreakable watch. After more than 200 prototypes and drop tests from 10 meters high, a legend was born that has sold over 100 million units worldwide. The GA-2100, recognisable at a glance by its octagonal silhouette and 11.8 mm profile, represents the perfect synthesis between traditional G-Shock resistance and ultra-thin contemporary design.

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Technical Specifications

Reference: GM-2100CB-1AER
Module/Caliber: 5611
Type: Analog-digital
Movement: Quartz
Water resistance: 200 meters (20 bar)
Shock resistance: Carbon Core Guard structure
Case material: Resin with ion-plated metal bezel
Case color: Black with gunmetal bezel
Strap material: Resin
Strap color: Black
Dial color: Matte black
Crystal: Mineral
Light: LED
Diameter: 44.4 mm
Thickness: 11.8 mm
Weight: 72.0 g
Functions: World time (31 zones), stopwatch 1/100s, countdown, 5 alarms, auto calendar, power saving
Battery: SR726W x 2
Made for: Men

User manual

Download the manual in English (PDF)