Seiko 5 Sports x Automatic ft. SKX Series aka 55th Anniversary Masked Rider (Limited Edition of 4,000 Pieces) Men Formal Round 100m Water Resistant Watch SRPJ91K1 SRPJ91 SRPJ-91 SRPJ-91K1 Discover the Seiko 5 Sports 55th Anniversary Masked Rider Limited Edition collaboration watch. Inspired by the iconic 1971 television hero, featuring a helmet-inspired dial, red scarf-lined calf strap, and Tachibana Racing logo case back. A modern tribute with special packaging and limited availability. 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 leather (calfskin) band 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 55th Anniversary Masked Rider (Limited Edition of 4,000 Pieces) LIMITED EDITION on the case back Serial number engraved on the case back Magnetic resistance (4,800 A/m) 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)