Invicta Men's 'Pro Diver' Japanese Automatic Stainless Steel Sport Watch, Color:Silver-Toned (Model: INVICTA-4847) Quality Japanese-automatic movement; functions without a battery; powers automatically with the movement of your arm Scratch-resistant sapphire crystal Case diameter: 41 mm Stainless-steel case; black, diamond-accented dial; date function with magnifier; unidirectional bezel Water resistant to 660 feet (200 M): suitable for recreational scuba diving