Seiko SRPB11K1 Men Prospex Automatic Divers Blue Lagoon Turtle LIMITED Watch. Japan made automatic movement. Self-winding with hand winding capability. Caliber 4R36. 24 jewels. 21,600 vibrations per hour. Power reserve: approximately 41 hours. Unidirectional rotating bezel. Blue dial with luminous hands and markers. Day and date display at 3 o’clock position. Sapphire crystal. Water resistance up to 200 meters for diving. Approximate case diameter: 44.3mm.