Seiko 5 Sports x Automatic ft. SKX Series aka Gene Kranz Recreation (Limited Edition of 9,999 Pieces) Men Formal Tonneau 100m Water Resistant Watch SRPL91K1 SRPL91 SRPL-91 SRPL-91K1 Channel 1960s space history with this Seiko 5 Sports reissue, inspired by the iconic tool watch worn by NASA Eugene Kranz. Features a vintage dial with bi-directional bezel, day-date display, and multi-link bracelet. Powered by the 4R36 automatic movement (40h power reserve) with 100m water resistance - a timeless tribute to Seiko legendary durability. Caliber Number / Movement 4R36 (automatic with manual winding capacity) Power Reserve / Accuracy Approximately 41 hours (+45 to -35 seconds per day) Crystal Hardlex crystal (dual-curved) Luminous LumiBrite on hands, indexes and bezel Case / Band Material Stainless steel case with stainless steel band (three-fold clasp with push-button release) Water Resistance 100m / 10 bar Case Size Thickness: 12.3 mm Diameter: 38.2 mm Length: 44.7 mm Lug width: 20.0 mm Other Specifications Seiko 5 Sports x Automatic ft. SKX Series aka Gene Kranz Recreation (Limited Edition of 9,999 Pieces) LIMITED EDITION on the case back Serial number engraved on the case back Magnetic resistance (4,800 A/m) Bidirectional rotating bezel Screw case back 24 jewels Day and date display Stop second hand function (hacking mechanism) Regular timekeeping (analog display)