Casio GA-100CY-1AER G Shock Caution Yellow Shock Resistant Black Silicone Men's WatchCore Features of the Casio G Shock Carbon Core Octagon: These G Shock watches are water resistant up to 20 bars or 200 meters. The hands and the indices of the models are luminescent. This watch pays homage to the original model through its retro inspired octagonal bezel. Model Specifications GA 100CY 1AER: The black case of the dual display watch is made of resin. The black dial with yellow accents gives the watch its high tech appearance. Both the