Croton Men's CA401094TTBK Two-Tone Automatic Dive Watchand Winder Quality Japanese Automatic movement; functions without a battery; powers automatically with the movement of your arm Mineral crystal Case diameter: 44 mm; black, gold-tone lined unidirectional bezel Stainless-steel case; black dial; stainless-steel bracelet with gold-tone center-links; date function with magnifier Water resistant to 660 feet (200 M): suitable for recreational scuba diving