Features: Stainless Steel Case PU Strap Automatic Movement Caliber: Seiko NH35 Power Reserve Up To 40 Hours Sapphire Crystal Helium Valve Blue Dial With Logo 'RATIO' Analog Display Luminous Hands And Markers Date Display Screw Down Crown Engraved Caseback (With Image Of A Free Diver) Buckle Clasp 1000M Water Resistance Approximate Case Diameter: 45mm Approximate Case Thickness: 15mm