Seiko Prospex x Automatic ft. Alpinist aka Summit Black Men Formal Round 200m Water Resistant Watch SPB505J1 SPB505 SPB-505 SPB-505J1 Discover the new Seiko Prospex Alpinist series featuring upgraded 6R55 movement with 72-hour power reserve. These 39.5mm adventure watches offer teal pine, summit black or pine green dials with internal compass scales, 200m water resistance and retro Alpinist branding for mountain exploration. Caliber Number / Movement 6R55 (automatic with manual winding capacity) Power Reserve / Accuracy Approximately 72 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 (super hard coating) case with stainless steel band (three-fold clasp with push-button release) Water Resistance 200m / 20 bar Case Size Thickness: 12.7 mm Diameter: 39.5 mm Length: 46.4 mm Lug width: 20.0 mm Other Specifications Seiko Prospex x Automatic ft. Alpinist aka Summit Black Made in Japan Magnetic resistance (4,800 A/m) 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)