DESC: Black Resin Case and Bracelet. Black Digital Dial. Mineral Crystal. Buckle clasp. Fixed bezel. Quartz movement. 51mm Case diameter. 17mm Case thickness. 200m Water resistance. 1/100-second stopwatch. 12/24-hour format. 5 independent alarms. World Time 31 time zones. Casio Mens G-Shock Military Watch GD100-1B.