Cartier 9618 MC

The caliber 9618 MC is Cartier's in-house manual-winding skeleton movement, introduced in 2013 as part of the MC family. It serves as the mechanical base for the Rotonde Astromystérieux, one of the brand's most technically ambitious watches. The movement features a openworked construction that exposes the going train and decorative bridges. Production remains limited, with the caliber reserved for this single reference.