Stuhrling Original Men&#39;s Automatic Stainless Steel and Rubber Dress Watch, Color Quality automatic movement; functions without a battery; powers automatically with the movement of your arm Reliable automatic-self-wind movement 20 jewels Beautifully hand engraved skeleton movement with blued steel screws and skeleton rotor Krysterna scratch resistant crystal Water resistant to 165 feet (50 M): suitable for swimming and showering