GM-S2100 | CASIO,METAL COVERED - GM-S2100 | CASIO,GMAS2100-1A | Women's Watch G-SHOCK | CASIO,GM-S2100 is one of the smallest G-Shocks and Casio markets the series as unisex or women's. But in the wider world of wristwatches, its dimensions fall on the sweet spot for men's,My Favourite Casio Model - The G-Shock GM-S2100