Invicta Men's 3196 Pro Diver Collection Commemorative Edition Watch Made in USA or Imported Quality Japanese Automatic movement; Functions without a battery; Powers automatically with the movement of your arm Antireflective-sapphire crystal Case diameter: 47 mm Stainless-steel case; White-mother-of-pearl 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