Case: 316L High Precision Stainless Steel, Individually Numbered, Screw Down Caseback Dial: Black Sunray Dial and Black Bezel with luminous dot index and hands Glass: Domed Sapphire Crystal with Anti-Reflective Coating Movement: TMI VH31 W. Sweep Second Hand, Quartz (Japanese) Size: 42 mm wide, 12 mm thick, 20mm Lug, 50.5 mm lug-to-lug Water resistance: 20 atm tested / 200m (suitable for diving)