Seiko Prospex x Automatic ft. Mini Tuna aka Safari Street Series Men Diver Round 200m Water Resistant Watch SRPF81K1 SRPF81 SRPF-81 SRPF-81K1 Explore the urban outdoors with the Seiko Prospex Mini Tuna Safari SRPF81K1 - a 200m water-resistant dive watch blending rugged functionality with street-ready style. Features 4R35 automatic movement (41h power reserve), hardlex crystal, and LumiBrite illumination. The 43.2mm stainless steel case with silicone band offers adventure-ready durability in a compact package. Caliber Number / Movement 4R35 (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: 12.6 mm Diameter: 43.2 mm Length: 44.0 mm Lug width: 20.0 mm Other Specifications Seiko Prospex x Automatic ft. Mini Tuna aka Safari Street Series Unidirectional rotating bezel Screw-down crown Screw case back 23 jewels Date display Stop second hand function (hacking mechanism) Regular timekeeping (analog display)