This watch however should not be judged by its beauty alone. Housed within is the incredibly innovative in-house calibre 9800 MC the crowning feature of which is the remarkable Astroregulateur. This complication, devised by Cartier's master watchmaker as an alternative to a standard tourbillon, alleviates the effects of gravity on the escapement by having it directly linked to the rotor that can be seen through the aperture to the dial. Allowing the escapement, and the subsidiary seconds dial to rotate with the rotor, which even more interestingly is forced to spin at a constant speed by a system of two differentials.
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