Seiko Prospex x Automatic ft. Alpinist Men Formal Round 200m Water Resistant Watch SPB210J1 SPB210 SPB-210 SPB-210J1 Discover the Seiko Alpinist, a reliable tool watch that blends rugged functionality with urban style. Originally designed for Japanese mountaineers in the 1960s, it retains its charm and durability. With a history dating back to 1961, the Alpinist features iconic elements like an inner rotating compass bezel and cathedral hands. Modern versions boast upgrades such as a sapphire crystal and a 70-hour power reserve, ideal for both outdoor adventures and daily wear. 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 case with leather (calfskin) 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 Made in Japan 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)