Seiko Prospex x Automatic ft. Professional Marinemaster aka 140th Anniversary (Limited Edition of 3,000 Pieces) Men Diver Round 300m Water Resistant Watch SLA047J1 SLA047 SLA-047 SLA-047J1 Introducing the Seiko Prospex marinemaster, a limited edition diver watch celebrating 140 years of excellence. With 300m water resistance, it features a stainless steel case, ceramic bezel, and anti-reflective sapphire crystal. Powered by the reliable 8L35 movement, it offers a 50-hour power reserve. The watch comes with a secure stainless steel band and an additional silicone strap, ideal for any adventure. Caliber Number / Movement 8L35 (automatic with manual winding capacity) Power Reserve / Accuracy Approximately 50 hours (+15 to -10 seconds per day) Crystal Sapphire crystal (anti-reflective coating) Luminous LumiBrite on hands, indexes and bezel Case / Band Material Stainless steel case, ceramic bezel insert with stainless steel band (three-fold clasp with secure lock, push-button release with slide extender) Water Resistance 300m / 1,000ft diver Case Size Thickness: 15.4 mm Diameter: 44.3 mm Length: 50.5 mm Lug width: 20.0 mm Other Specifications Seiko Prospex x Automatic ft. Marinemaster aka 140th Anniversary (Limited Edition of 3,000 Pieces) Made in Japan Additional silicone strap inclusive LIMITED EDITION on the case back Serial number engraved on the case back 28,800 vibrations per hour (8 beats per second) Unidirectional rotating bezel One-piece structure Screw-down crown 26 jewels Date display Stop second hand function (hacking mechanism) Regular timekeeping (analog display)