Seiko Prospex x Automatic ft. Turtle aka The Black Series Men Diver Tonneau 200m Water Resistant Watch SRPD46K1 SRPD46 SRPD-46 SRPD-46K1 Discover Seiko bold Black Series Turtle SRPD46 - a special edition night diver with a hard black PVD/DLC coating, vibrant accents, and 200m water resistance. Powered by the 4R36 automatic movement (41h power reserve), this 44mm cushion-case watch features LumiBrite lume, unidirectional bezel, and matching silicone strap. A striking update to an iconic diver. Caliber Number / Movement 4R36 (automatic with manual winding capacity) Power Reserve / Accuracy Approximately 41 hours (+45 to -35 seconds per day) Crystal Hardlex crystal Luminous LumiBrite on hands, indexes and bezel Case / Band Material Stainless steel case with silicone band Water Resistance 200m / 660ft diver Case Size Thickness: 13.4 mm Diameter: 45.0 mm Length: 47.7 mm Lug width: 22.0 mm Other Specifications Seiko Prospex x Automatic ft. Turtle aka The Black Series 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)