Features:Stainless Steel CasePU StrapAutomatic MovementCaliber: Seiko NH35Power Reserve Up To 40 HoursSapphire CrystalHelium ValveGreen Dial With Logo "RATIO"Analog DisplayLuminous Hands And MarkersDate DisplayScrew Down CrownEngraved Caseback (With Image Of A Free Diver)Buckle Clasp1000M Water ResistanceApproximate Case Diameter: 41mmApproximate Case Thickness: 15mm