Seiko Prospex x Automatic ft. King Turtle aka Manta Ray aka Save The Ocean (STO) (Special Edition) Men Diver Tonneau 200m Water Resistant Watch SRPF77K1 SRPF77 SRPF-77 SRPF-77K1 Dive into ocean conservation with the Seiko Prospex King Turtle Manta Ray SRPF77K1 - a 200m water-resistant special edition honoring marine life. Features ceramic bezel, sapphire crystal with AR coating, and 4R36 automatic movement (41h power reserve). The LumiBrite-lit dial and silicone band ensure performance, while the manta ray motif celebrates ocean preservation. Caliber Number / Movement 4R36 (automatic with manual winding capacity) Power Reserve / Accuracy Approximately 41 hours (+45 to -35 seconds per day) Crystal Sapphire crystal with magnifier (anti-reflective coating) Luminous LumiBrite on hands, indexes and bezel Case / Band Material Stainless steel case, ceramic bezel insert with silicone band Water Resistance 200m / 660ft diver Case Size Thickness: 13.2 mm Diameter: 45.0 mm Length: 47.7 mm Lug width: 22.0 mm Other Specifications Seiko Prospex x Automatic ft. King Turtle aka Manta Ray aka Save The Ocean (STO) (Special Edition) SPECIAL EDITION on the case back Unidirectional rotating bezel Screw-down crown Screw case back 24 jewels Day and date display Stop second hand function (hacking mechanism) Regular timekeeping (analog display)