Case: Stainless Steel, Round Caseback: Stainless Steel, Screw-down, Solid Bezel: Stainless Steel, Black, Uni-Directional Dial: Green, analog Hands: Silvertone Markers: Luminescent, Indices, Silvertone luminescent indices Calendar: Magnified Date display window at the 3 o'clock position Functions: Hour, Minute, Second, Date Strap: Rubber, Black Clasp: Deployment-clasp-with-push-button, Stainless Steel Crystal: Sapphire Crown: Stainless Steel, Screw-down Movement: SW200 Automatic Movement, 28‘800 oscillations Water Resistance: 30 atm/300 meters/1000 feet Power Reserve: 38 hours Case measurements: 42 mm in diameter x 12.65 mm thick Strap measurements: 22 mm wide x 8 in long Country of Origin: Switzerland Model: 17571.2831