Revue Thommen Men's Diver Black Dial Stainless Steel GMT Automatic Watch. Bezel: Polished stainless steel, with a black top ring, GMT scale, unidirectional rotating Calendar: Magnified date display window at the 3 o'clock position Clasp: Deployment with safety, integrated diver's extension Case measurements: 42 mm in diameter x 13 mm thick Box measurements: 6 inches wide x 6 inches long x 5 inches high All measurements are approximate and may vary slightly from the listed dimensions. Automatic movement winds with the movement of your arm. It is recommended that you wind the watch every two weeks. A screw-down crown (knob) creates a water-resistant seal. To unscrew the crown, turn counter-clockwise and pull/push into position to set time, date, and other functions. To close the crown, press