Stuhrling Original Men's Automatic Stainless Steel and Rubber Sport Watch, Color:Black (Model: 175M.331627) Quality automatic movement; functions without a battery; powers automatically with the movement of your arm Reliable automatic-self-wind movement 22 jewels and features date at the three o'clock position with magnifier Genuine mother of pearl dial with a rugged diver look Krysterna scratch resistant crystal Water resistant to 330 feet (100 M): suitable for snorkeling, as well as swimming, but not diving