Seiko Presage x Automatic ft. 1964 Crown Chronograph aka Style60s aka Open Heart aka Rugged Biker Men Formal Round 50m Water Resistant Watch SSA461J1 SSA461 SSA-461 SSA-461J1Discover the Seiko Presage Style60s SSA461, a vintage-inspired automatic watch featuring a 39.5mm stainless steel case, box-shaped hardlex crystal, and elegant earth-tone dial with LumiBrite illumination . Powered by the 4R72 movement with 41-hour power reserve and 50m water resistance. Combines 1964 Crown Chronograph design with modern reliability .Caliber Number / Movement4R72 (automatic with manual winding capacity)Power Reserve / AccuracyApproximately 41 hours (+40 to -20 seconds per day)CrystalHardlex crystal (curved)LuminousLumiBrite on hands and indexesCase / Band MaterialStainless steel case with leather (calfskin) bandWater Resistance50m / 5 barCase SizeThickness: 12.0 mmDiameter: 39.5 mmLength: 46.2 mmLug width: 20.0 mmOther SpecificationsSeiko Presage x Automatic ft. 1964 Crown Chronograph aka Style60s aka Open Heart aka Rugged BikerMade in JapanMagnetic resistance (4,800 A/m)See-through case backScrew case back24 jewelsStop second hand function (hacking mechanism)Regular timekeeping (analog display)