The Cartier Santos-Dumont Skeleton Micro-Rotor reference WHSA0031 is a luxury timepiece that combines historical design with modern skeletonized watchmaking. It features a large-sized 18k yellow gold case measuring 31.4mm in width and 8mm in thickness, characterized by its iconic square silhouette and a bezel adorned with blue lacquer. The watch is distinguished by its skeletonized dial where the bridges are intricately shaped into a network that mirrors the case’s geometry, also featuring blue lacquered surfaces. Time is indicated by blued-steel sword-shaped hands over a structural layout where the bridges themselves serve as hour markers.
The timepiece is powered by the manufacture calibre 9629 MC, an automatic movement developed specifically for this collection over a two-year period. A notable complication and aesthetic focal point is the platinum micro-rotor, which is decorated with a miniature replica of Alberto Santos-Dumont’s Demoiselle aircraft. The movement operates at a frequency of 28,800 vibrations per hour and provides a power reserve of approximately 44 to 46 hours. The watch offers 30 meters of water resistance and is equipped with an interchangeable alligator leather strap featuring a yellow gold ardillon buckle.
General reviews highlight the watch as a masterclass in aesthetic movement arrangement, successfully blending Cartier’s design-first philosophy with technical innovation. Enthusiasts frequently praise the balanced proportions of the large case and the whimsical detail of the micro-rotor airplane. However, some critics note that the skeletonized design can make the time difficult to read at a glance. Additionally, while the finishing is considered exceptional, the 44-hour power reserve is sometimes viewed as relatively short, a constraint attributed to the compact dimensions and symmetrical layout of the movement.