GM-S2100 | CASIO,GM-S2100-3A | G-SHOCK ANALOG-DIGITAL Silver | CASIO,METAL COVERED - GM-S2100 | 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,G-SHOCK GM-S2100 Specifications and New Releases - G-Central G-Shock Fan Site