Swiss Legend Men's 30012-BLK-MOPBLK-RED Limousine Collection Automatic Watch and Winder Quality Swiss Automatic movement; Functions without a battery; Powers automatically with the movement of your arm Scratch-resistant-sapphire crystal Case diameter: 38 mm Black-ion-plated-stainless-steel case; Black-mother-of-pearl dial; Date function Water resistant to 165 feet (50 M): suitable for swimming and showering