The Caliber 9438 MC combines two complications - the tourbillon and the chronograph - in a movement with an 8-day power reserve. For this exceptional caliber, Cartier has opted for a column-wheel transmission system for the chronograph functions. Thus the column wheel coordinates all phases of the chronograph hand: start, stop and reset-to-zero. Another characteristic of this movement with manual winding: it has a power reserve of 8 days with a stop-work mechanism that ensures constant timekeeping and thus avoids any untimely stopping of the watch. Special attention has been devoted to details: the mirror-polished bridge is engraved with the seconds scale. The carriage rotates once every minute, so that the seconds can be displayed by the hand mounted on the spindle of the carriage.
Numbered edition limited to 50 timepieces. Tourbillon and chronograph complications with a power reserve of 8 days, case in 18K white gold, fluted crown in 18K white gold set with a sapphire cabochon, sapphire crystal, slate-gray galvanic guilloché dial, diamond-shaped blued-steel hands, black alligator-skin strap, double adjustable deployant buckle in 18K white gold, water-resistant to 3 bars (30 meters/100 feet). Manufacture mechanical movement with manual winding caliber 9438 MC, tourbillon chronograph, power reserve of 8 days, total diameter: 34.6 mm, thickness: 8.15 mm, 318 parts including 31 jewels, balance: 21,600 vibrations/hour, approx. 8 days of power reserve, individually numbered movement.Case dimensions: 46 mm in diameter - 15.3 mm thickness.