Seiko 5 Sports x Automatic ft. Field Series aka Stealth Blackout Men Formal Round 100m Water Resistant Watch SRPJ09K1 SRPJ09 SRPJ-09 SRPJ-09K1 Discover the Seiko 5 Sports SRPJ09K1 Field Series Stealth Blackout watch, featuring a 39.4mm stainless steel case and bracelet with full blackout design. Powered by the 4R36 automatic movement with 41-hour power reserve, day-date display, and 100m water resistance. Includes magnetic 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 and indexes 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: 13.1 mm Diameter: 39.4 mm Length: 48.0 mm Lug width: 20.0 mm Other Specifications Seiko 5 Sports x Automatic ft. Field Series aka Stealth Blackout Magnetic resistance (4,800 A/m) See-through back case Screw case back 24 jewels Day and date display Stop second hand function (hacking mechanism) Regular timekeeping (analog display)