Manual and automatic winding capabilities. 21,600 vibrations per hour. Power reserve: approximately 41 hours. 24 jewels. Black ceramic one-way rotating elapsed timing bezel. Khaki green dial with 3-D pressed pattern. Magnified day/date calendar. LumiBrite hands and markers Sapphire crystal with anti-reflective coating on the inner surface Screwdown crown and caseback. Case diameter: 45.0mm. Stainless steel case Khaki green silicone strap Water-resistant to 200 meters (660 feet), Divers Watch. Meets ISO standards and is suitable for scuba diving.. Caliber 4R36. . . . . . . . . .