Seiko Prospex Alpinist SPB210

MOVEMENT:Caliber Number6R35Movement TypeAutomatic with manual windingAccuracy+25 to -15 seconds per dayDurationApprox. 70 hoursExteriorCase MaterialStainless steelCrystalSapphire crystal with magnifierCrystal CoatingAnti-reflective coating on inner surfaceLumiBriteLumibrite on hands and indexesBand MaterialCalfskinClaspThree-fold clasp with push button releaseOther DetailsWater Resistance20 barCase SizeThickness: 13.2 mmDiameter: 39.5 mmLength: 46.4 mmWeight85.0 gOther Specifications:Rotating compass inner ringScrew case backScrew-down crownSee-through case backOther Features:24 jewelsDate displayStop second hand function