GA2100-1A
From G-SHOCK, the toughness watches that continue to evolve in search of ultimate strength, this digital-analog combination model inherits the concept of the first-generation DW5000C models, while being even thinner. Inherits the octagonal shape that was also used in the first-generation DW5000C model. A combination model developed with a simple design that eliminates waste while maintaining a tough structure. 
Also achieves a thickness of 11.8 mm thanks to a highly rigid fine resin containing carbon fiber for the case material.
 
Case size (L× W× H): 48.5 × 45.4 × 11.8 mm
Weight: 51 g
Case and bezel material: Carbon / Resin　
Band: Resin Band
Construction: Shock Resistant
Water resistance: 200-meter water resistance
Power supply and battery life: Approx. battery life: 3 years on SR726W X 2
Glass: Mineral Glass