Seiko Prospex x Automatic ft. King Samurai aka Manta Ray aka Save The Ocean (STO) (Special Edition) Men Diver Round 200m Water Resistant Watch SRPE79K1 SRPE79 SRPE-79 SRPE-79K1 Dive into marine conservation with the Seiko Prospex King Samurai Manta Ray SRPE79K1 - a 200m water-resistant special edition featuring a striking ocean-inspired dial. Powered by the 4R35 automatic movement (41h power reserve) with sapphire crystal, ceramic bezel, and LumiBrite illumination. The 43.8mm stainless steel case with silicone band combines professional dive specs with eco-conscious style. Caliber Number / Movement 4R35 (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: 12.8 mm Diameter: 43.8 mm Length: 48.7 mm Lug width: 22.0 mm Other Specifications Seiko Prospex x Automatic ft. King Samurai 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 23 jewels Date display Stop second hand function (hacking mechanism) Regular timekeeping (analog display)