The Cartier Santos Skeleton Large Model, reference WHSA0027, is a contemporary interpretation of one of the earliest wristwatches in history. This timepiece features a 39.8mm stainless steel case with a thickness of 9.08mm, maintaining a slim profile despite its “Large” designation. A notable aesthetic choice for this specific reference is the black ADLC (Amorphous Diamond-Like Carbon) coating on the steel case, which provides a matte, industrial appearance and enhanced scratch resistance. The signature square bezel with exposed screws remains a central design element, while the seven-sided crown is set with a faceted gray spinel.
The defining complication of the WHSA0027 is its fully skeletonized dial and movement. Rather than a traditional dial plate, the Manufacture mechanical caliber 9611 MC is engineered so that its bridges form large Roman numerals that serve as the hour markers. These bridges are covered in gray lacquer to provide a subtle contrast against the underlying mechanical components. The watch indicates hours and minutes using gray-steel sword-shaped hands. This manual-winding movement is comprised of 138 parts, operates at a frequency of 28,800 vibrations per hour, and offers a substantial power reserve of approximately 70 hours.
General reviews of the Santos Skeleton WHSA0027 emphasize its balance between horological transparency and wearable comfort. Collectors often praise the “QuickSwitch” and “SmartLink” systems, which allow for tool-less strap changes and bracelet resizing, respectively. The watch typically comes with both a steel bracelet and a gray alligator leather strap, offering versatility. While the skeletonization is celebrated for its architectural depth and the way it integrates the brand’s identity into the movement itself, some critics note that legibility can be more challenging than on standard Santos models due to the absence of a high-contrast background. Nevertheless, it is widely regarded as a successful modern evolution of a classic design, suitable for those seeking a technical and avant-garde luxury sports watch.