Features:Stainless Steel CaseStainless Steel BraceletAutomatic MovementCaliber: Seiko NH35Power Reserve Up To 40 HoursSapphire CrystalHelium ValveBlack Dial With Logo "RATIO"Analog DisplayLuminous Hands And MarkersDate DisplayScrew Down CrownEngraved Caseback (With Image Of A Free Diver)Deployment Clasp1000M Water ResistanceApproximate Case Diameter: 45mmApproximate Case Thickness: 15mm