GMS2100B-8A | Women's Watch G-SHOCK | CASIO,Casio launches new G-Shock GM-S2100 metal-clad octagonal watches - NotebookCheck.net News,Casio Men Analogue-Digital Quartz Watch with Plastic Strap GM-S2100B-8AER : Amazon.co.uk: Fashion,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,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,