TVS presents .TVS Factory Omega Omega Speedmaster Series OB2 Co Axial Chronograph Watch .Model 311.30.44.51.01.002 .TVS independently developed 9900 caliber Master Chronometer dual T movement, featuring a 12 hour and 60 minute cumulative chronograph sub dial. All functions and appearance are identical to the original, a true masterpiece by TVS.Vibration frequency: 28,800 beats per hour .Power reserve: 60 hours .Stainless steel case with a domed double sided anti reflective scratch resistant glass .The best luxury gift recommendation. Please recognize the exclusive quality of TVS.