Omega Speedmaster Co-Axial Chronograph Watch .Model: 311.30.44.51.01.002 .TVS independently developed the Caliber 9900 Master Chronometer dual-T movement, featuring a 12-hour and 60-minute cumulative chronograph at 3 o'clock. All functions and appearance are consistent with the original version, a masterpiece of craftsmanship by TVS.Vibration frequency: 28,800 vibrations per hour .Power reserve: 60 hours .Stainless steel case and strap, with a curved double-sided anti-reflective and scratch-resistant glass.