Seiko Prospex Automatic King Sumo Blue Gradation SPB321J1. Watch with steel case with a diameter of 45 mm and a thickness of 13.5 mm. Unidirectional rotating bezel in blue colored stainless steel with polished and satin finish. Blue dial with wave-shaped details, mineral glass. Screw-down crown and case back. LumiBrite on hands, indexes and bezel. Anti-reflection coating on the inner surface. Automatic movement with manual winding capability, caliber 6R35, +25 to -15 seconds per day. 24 jewels with second hand stop function. Silver-colored steel bracelet with triple folding clasp with safety lock, push-button release with extender. Underwater model 200 m / 660 ft. Delivered with original box and official guarantee. bf22