Ulysse Nardin Men's Automatic Stainless Steel and Rubber Diving Watch(Model: 263-33-3/91) Made in USA or Imported Quality Automatic movement; Functions without a battery; Powers automatically with the movement of your arm Scratch-resistant-sapphire crystal Case diameter: 42.7 mm Stainless-steel case; Grey dial; Date function Water resistant to 990 feet (300 M):suitable for scuba diving to a depth of 30 meters for up to 2 hours