Casio G-Shock GM-2100N-2AER Blue Analogue Digital Men's WatchCore Features of the Casio G Shock Carbon Core Octagon: G Shock watches are water resistant up to over 10 bars or 100 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: GM 2100N 2AER The blue case of the watch is made of resin with a stainless steel bezel. A blue resin strap secures the watch. The blue dial gives the watch its