Stainless Steel Case Black Silicone Strap With Stainless Steel Buckle Automatic Movement Caliber: MIYOTA 8215 21 Jewels Vibrations Per Hour: 21,600 bph Shock System: Parashock Unidirectional Bezel Sapphire Crystal With Antireflective Coating Black Dial Analog Display 40 Hours Power Reserve Luminous Hands And Markers Date Window At 3 Oclock Screw Engraved Crown Engraved Caseback (With Image Of A Free Diver) Buckle Clasp 500m Water Resistance This Watch Is Pressure Tested Approximate Case Diameter: 42mm Approximate Case Thickness: 15.65mm Approximate Lug Width: 20mm