Stainless Steel Case Black Silicone Strap Automatic Movement Caliber: Seiko NH36 Sapphire Crystal Black Dial Analog Display Helium-Safe 40 Hours Power Reserve Luminous Hands And Markers Day And Date Display Screw Down Crown Uni Directional Rotating Bezel Engraved Caseback (With Image Of A Free Diver) Buckle Clasp 1000M Water Resistance Approximate Case Diameter: 47mm Approximate Case Thickness: 15mm