Corum Men's Swiss Automatic Stainless Steel and Leather Sport Watch(Model: 285-181-20-F701 SHRK) Quality Swiss Automatic movement; Functions without a battery; Powers automatically with the movement of your arm Scratch-resistant-sapphire crystal Case diameter: 50 mm Stainless-steel case; Green dial; Date function Water resistant to 99 feet (30 M): withstands rain and splashes of water, but not showering or submersion