SEIKO Prospex 1965 Heritage Diver's Watch Save the Ocean Limited Edition SPB545J1Collection: Prospex 1965 Heritage Diver's Watch Save the Ocean Limited Edition (4,000 pieces) Crystal: Curved sapphire crystal with anti reflective coating on inner surface Dial color: Sunray patterned blue inspired by Okinawa's ocean Movement: Automatic with manual winding (Caliber 6R55); approx. 72 hour power reserve; 24 jewels; accuracy +25 to 15 sec per day; stop second hand Water resistance: 300 m 1000 ft diver's Case material: Stainless steel