Self winding mechanical movement. 21 jewels. 28,800 vibrations an hour. Power reserve: approximately 40 hours. High precision adjustment in 4 positions. (Tolerance of 0/+10 seconds a day). Functions: hours,minutes and seconds (all central hands) Hour settings with seconds stopped. XL case. Diameter 46 mm. Thickness 10,5 mm. Screw-in crown. Anti-reflective sapphire crystal. Waterproof to 100 (325 ft). NEW IN BOX NEVER WORN