Triumph Motorcycles Men's Japanese Automatic Stainless Steel and Leather Casual Watch(Model: TRIUMPH-3033-01) Quality Japanese automatic movement; functions without a battery; powers automatically with the movement of your arm Mineral crystal Case diameter: 51 mm Stainless-steel case; black dial; date function Water resistant to 330 feet (100 M): suitable for snorkeling, as well as swimming, but not diving