Manufacturer: Seiko Model: SRPH57 U.S. Special Edition Shellebrating the Sea Turtle. Promoting ocean exploration and conservation. Gender: Men Condition: New with box and papers Case: Stainless steel Diameter: 45 mm. Thickness: 13.2 mm. Dial: Turquoise Turtle Shell Caseback: Screw-down Lumibrite: Luminous hands and markers Crystal: Sapphire crystal with anti-reflective coating on the inner surface Crown: Screw-down, push and pull. Band: Stainless steel bracelet with three-fold clasp with secure lock, push button release with extender. Comes with additional green silicone strap Movement: Automatic Caliber 4R36 Accuracy: +45 to -35 seconds per day Power reserve: Approx. 41 hours Water resistant: up to 200 meters / 660 feet. Follows ISO standards for scuba diving Functions: 24 jewels, Day/Date display in english and kanji, stop seconds hand function, unidirectional ceramic rotating bezel, Special Edition on the case back, screwdown caseback