G-SHOCK 2100. STORY BEHIND | CASIO,G-SHOCK 2100. STORY BEHIND | CASIO,GA2100-1A1 | Monochrome Black Analog-Digital Watch | Casio G-SHOCK,Casio G-Shock GA-2100 'CasiOak' Review: Possibly the Best Watch Under $100 - Quill & Pad,Here's why the CasiOak is the best G-Shock ever made