Features: Stainless Steel Case Rubber Strap Automatic Movement Caliber: 8800 35 Jewels Domed scratch Resistant Sapphire crystal With Anti?Reflective Treatment On Both Sides Black Dial Analog Display Power Reserve Up to 55 Hours Anti-Magnetic Chronometer Helium Escape Valve Luminous Hands And Markers Date Display Unidirectional Rotating Bezel Screw In Crown See Through Case Back Buckle Clasp 300M Water Resistance Approximate Case Diameter: 42.00 mm Approximate Case Thickness: 13.60 mm Approximate Lug Width: 20.00 mm nbsp;