Omega Men's 2200.51.00 Seamaster Planet Ocean XL Automatic Chronometer Stainless Steel Watch Importado Quality Swiss Automatic movement; Functions without a battery; Powers automatically with the movement of your arm Domed, scratch-resistant sapphire crystal Case diameter: 44.8 mm Stainless-steel case; Black dial; Date function Water-resistant to 600 M (2000 feet)