At the heart of this watch is the manually wound Manufacture caliber 9917 MC — a skeletonized movement that curves to follow the contours of the case itself, with the barrel and balance inclined to conform to its arc. Consisting of 142 individually numbered parts including 21 jewels, the movement measures 33.75 mm in length, 19.60 mm in width, and 3.84 mm in thickness, beating at 28,800 vibrations per hour with an approximately 60-hour power reserve.
The platinum case measures 8 mm thick and features a beaded crown set with a sapphire cabochon, while blued-steel sword-shaped hands sweep across the skeletonized dial. A mineral crystal protects the front, and a sapphire case back reveals the openworked movement within. The watch is not water-resistant.
A black alligator-skin strap secures the piece via an 18K white gold double adjustable folding buckle. Displaying hours and minutes, reference WHTA0009 represents the Tank Cintrée's architecture taken to a technical extreme — transparent, curved, and unmistakably Cartier.
