Casio G-Shock Classic Watch GA-100-1A2ER

Introducing the Casio G-Shock GA-100-1A2ER, a style statement that combines legendary G-Shock toughness with striking two-tone design. The matte black resin case contrasts brilliantly with electric blue accents that flow across the dial, subdials, and bezel elements. Blue luminescent hands stand out against a textured black dial, while rectangular blue indices create perfectly visible reference points. The molded black resin strap maintains the sporty aesthetic with its characteristic anti-slip texture.

At its heart beats the Casio 5081 module, an analog-digital system offering time reading in multiple formats. The subdial at 9 o'clock functions as a seconds chronograph, while dual LCD displays show complementary digital information including date, day of the week, and second time zone. Functions include 1/1000-second stopwatch with 100-hour capacity, five independent daily alarms, world time with 29 time zones, automatic calendar to year 2099, and characteristic LED light with blue afterglow that maintains the design's chromatic coherence.

The G-Shock collection 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, this family was born that has redefined resistance standards in watchmaking. The multi-layer protection structure, shock and vibration resistance, and ability to withstand 20 bar water pressure have made G-Shock the inseparable companion of athletes, military personnel, and adventurers worldwide.

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

Technical Specifications

Reference: GA-100-1A2ER
Module/Caliber: 5081
Type: Analog-digital
Movement: Quartz
Water Resistance: 200 meters (20 bar)
Shock Resistance: Yes, G-Shock structure
Case Material: Resin
Case Color: Matte black with blue details
Strap Material: Resin
Strap Color: Black
Dial Color: Black with blue indices
Crystal: Mineral
Light: LED with blue afterglow
Diameter: 51.2 mm
Thickness: 16.9 mm
Weight: 70.0 g
Functions: 1/1000 sec stopwatch, 5 alarms, world time, auto calendar, 12/24h format
Battery: CR1220
Made for: Men

User Manual

Download manual in English (PDF)