Features: Stainless Steel Case PU Strap Automatic Movement Caliber: MIYOTA 8215 21 Jewels Vibrations Per Hour: 21,600 bph Shock System: Parashock Winding Direction: Uni-directional (left) Sapphire Crystal Orange Dial With Logo 'RATIO' Analog Display 40 Hours Power Reserve Luminous Hands And Markers Date Display Screw Down Crown Engraved Caseback (With Image Of A Free Diver) Buckle Clasp 500M Water Resistance Approximate Case Diameter: 42mm Approximate Case Thickness: 13mm Â