Casio G-Shock Classic Watch GA-B2100-3AER

Introducing the Casio G-Shock GA-B2100-3AER, a military interpretation of the iconic GA-2100 that stands out with its uniform matte green finish. The octagonal resin case features a deep military green color with matte texture extending across the entire bezel, where "ADJUST", "LIGHT", "MODE" and "START" inscriptions appear engraved in black. The black dial creates dramatic contrast, with silver rectangular indices and a distinctive circular subdial at 9 o'clock with concentric texture. White luminous hands ensure readability, while the small digital display at 3 o'clock shows complementary information.

At its heart beats the Casio 5689 module, an analog-digital caliber with Bluetooth connectivity that syncs with the G-Shock Connected app. The textured subdial at 9 o'clock functions as a multifunction indicator, displaying days of the week, Bluetooth connection status and other parameters depending on the selected mode. Functions include world time with over 300 cities, 1/100 second stopwatch with 24-hour capacity, countdown timer, 5 daily alarms and fully automatic calendar until 2099. The Tough Solar function harnesses any light source to keep the battery charged.

G-Shock 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 withstood the planet's most extreme environments. The GA-2100 series, with its eight-sided case and 11.9 mm profile, has brought octagonal design within reach, becoming an icon of urban style and resistance.

Shopping at TicTacArea.com means buying from real jewelers with over 30 years of industry experience, serving as official distributors, online since 1999. Every product is genuine, factory-new, and delivered with its official presentation box, documentation, and international warranty.

Technical Specifications

Reference: GA-B2100-3AER
Module/Caliber: 5689
Type: Analog-digital
Movement: Quartz with Tough Solar
Water resistance: 200 meters
Shock resistance: Carbon Core Guard structure
Case material: Resin
Case color: Matte military green
Strap material: Resin
Strap color: Military green
Dial color: Black
Crystal: Mineral
Light: LED
Diameter: 45.5 mm
Thickness: 11.9 mm
Weight: 52 grams
Functions: Bluetooth, world time (300+ cities), 1/100 sec stopwatch, timer, 5 alarms, auto calendar
Battery: CTL920 with solar charging
Made for: Men

User manual

Download the manual in English (PDF)