Seiko 5 Sports x Automatic ft. SKX Series aka Regatta Timer (Special Edition) Men Formal Round 100m Water Resistant Watch SRPK11K1 SRPK11 SRPK-11 SRPK-11K1 Discover the Seiko 5 Sports SKX Style collection featuring 42.5mm stainless steel cases with unidirectional bezel and vibrant dial options. Powered by the reliable 4R36 automatic movement with 41-hour power reserve and day-date display. Perfect for outdoor activities with 100m water resistance and LumiBrite illumination. Caliber Number / Movement 4R36 (automatic with manual winding capacity) Power Reserve / Accuracy Approximately 41 hours (+45 to -35 seconds per day) Crystal Hardlex crystal (curved) Luminous LumiBrite on hands, indexes and bezel Case / Band Material Stainless steel case with stainless steel band (three-fold clasp with secure lock, push-button release) Water Resistance 100m / 10 bar Case Size Thickness: 13.4 mm Diameter: 42.5 mm Length: 46.0 mm Lug width: 22.0 mm Other Specifications Seiko 5 Sports x Automatic ft. SKX Series aka Regatta Timer (Special Edition) SPECIAL EDITION on the case back Unidirectional rotating bezel See-through back case Screw case back 24 jewels Day and date display Stop second hand function (hacking mechanism) Regular timekeeping (analog display)