From Seiko, the Men's Prospex Automatic Diver Padi Special Edition Watch features:     Automatic diver Stainless steel case and bracelet One-way rotating elapsed timing bezel LumiBrite hands and markers Manual and automatic winding capabilities Approx. 21,600 vibrations per hour Power reserve approx. 41 hours 24 jewels Day/Date calendar Screw down crown and case back Case diameter approx. 45.0mm Water Resistance: Up to 200 meters (660 feet) Diver's watch Follows ISO standards and is suitable for scuba diving Imported.