TVS Presents .TVS Factory Omega Omega Speedmaster Series OB2 Co Axial Chronograph Watch .Model: 311.30.44.51.01.002 .TVS independently developed the 9900 type Master Chronometer double 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 perfect luxurious gift recommendation, please recognize the exclusive quality of TVS.