Seiko Prospex x Automatic ft. Land Alpinist Men Formal Round 200m Water Resistant Watch SPB243J1 SPB243 SPB-243 SPB-243J1 The Seiko Prospex Land Alpinist redefines adventure watches with its sunburst dial, 38mm stainless steel case, and robust 6R35 movement (70h power reserve). Inspired by 1959 mountaineering heritage, this 200m water-resistant field watch features a sapphire crystal, screw-down crown, and elegant cathedral hands - perfect for explorers who demand style and performance. Caliber Number / Movement 6R35 (automatic with manual winding capacity) Power Reserve / Accuracy Approximately 70 hours (+25 to -15 seconds per day) Crystal Sapphire crystal (curved, anti-reflective coating) Luminous LumiBrite on hands and indexes Case / Band Material Stainless steel case with stainless steel band (three-fold clasp with push-button release) Water Resistance 200m / 20 bar Case Size Thickness: 12.9 mm Diameter: 38.0 mm Length: 46.2 mm Lug width: 19.0 mm Other Specifications Seiko Prospex x Automatic ft. Land Alpinist Made in Japan See-through case back Screw-down crown Screw case back 24 jewels Date display Stop second hand function (hacking mechanism) Regular timekeeping (analog display)