Casio G-SHOCK GST-B100B-1A3DR WatchG STEEL GST B100 Series GST B100B 1A3 This black ion plated model with an edge unique to the GST B100 series and a tough, sporty finish, is based on a G STEEL model designed with a motif of heavy jet engine blades and features a solid case equipped with an analog chronograph, as well as a urethane band. A dual coil motor in a rotating disc dial placed at 9 o'clock moves the dial blades and exudes a functional beauty. In addition to the alarm on off