Caliber: Chopard 03.05-CFunctions: Central hours, minutes and chronograph seconds; 30-minute counter at 3 o'clock with link hand making semi-instantaneous jumps; Date at 4:30; Chronograph with flyback; Stop-secondsDiameter: 28.8mmThickness: 7.6mmPower Reserve: 60 hoursWinding: AutomaticFrequency: 28,800 vphJewels: 45Chronometer Certified: Yes, by COSCAdditional Details: Vertical clutch, openworked central rotor with tungsten alloy