Seiko Prospex x Automatic ft. Alpinist aka The Black Series (Limited Edition of 5,500 Pieces) Men Formal Round 200m Water Resistant Watch SPB337J1 SPB337 SPB-337 SPB-337J1 Conquer the extremes with the Seiko Prospex Alpinist Black Series Limited Edition, blending the 1959 Alpinist heritage with modern adventure-ready tech. Featuring a black-coated stainless steel case, Green LumiBrite Pro for night visibility, rotating inner compass ring, and 70-hour automatic movement, this 200m water-resistant timepiece is built for exploration. The anti-reflective sapphire crystal and see-through caseback complete this professional-grade tool watch. Caliber Number / Movement 6R35 (automatic with manual winding capacity) Power Reserve / Accuracy Approximately 70 hours (+25 to -15 seconds per day) Crystal Sapphire crystal with magnifier (anti-reflective coating) Luminous LumiBrite on hands and indexes Case / Band Material Stainless steel (hard coating) case with stainless steel band (three-fold clasp with push-button release) Water Resistance 200m / 20 bar Case Size Thickness: 13.2 mm Diameter: 39.5 mm Length: 46.4 mm Lug width: 20.0 mm Other Specifications Seiko Prospex x Automatic ft. Alpinist aka The Black Series (Limited Edition of 5,500 Pieces) Made in Japan LIMITED EDITION on the case back Serial number engraved on the case back Rotating compass inner ring See-through case back Screw-down crown Screw case back 24 jewels Date display Stop second hand function (hacking mechanism) Regular timekeeping (analog display)
