From Seiko, the Men's Prospex Automatic Diver U.S. Special Edition Stainless Steel Case Watch features:  Stainless steel case and bracelet Black ceramic unidirectional rotating elapsed timing bezel Intricately patterned turquoise dial inspired by the turtle shell Link/Clasp closure Automatic diver with manual winding capability Approx. 21,600 vibrations per hour  Power reserve of approx. 41 hours 24 jewels  Day/date calendar  LumiBrite hands and markers Screw down crown 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.