GA-2100-4A Quartz Icon Resin RedFrom G SHOCK, the GA2100 ana log digital inherits the octagonal shape that was also used in the first generation DW 5000C 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 its Carbon Core Guard Structure where a highly rigid fine resin containing carbon fiber is used for the case material.