Casio G-Shock GA2100SU-1A “CASIOAK” The Casio G-Shock CasiOak. Almost every year Casio comes out with a model or two that set the G-Shock world on fire, and this year it is the watch dubbed the CasiOak. Now, I admittedly do not keep up with every watch coming from G-Shock and I am sure there are special editions and limited releases I miss, but 2 years ago the big mainstream G-Sho...