Rotonde de Cartier skeleton watch with mysterious display

Rotonde de Cartier Mysterious Hour Skeleton watch, 42 mm, Manufacture mechanical movement with manual winding, 9983 MC. White gold 750/1000 case set with 28 brilliant-cut diamonds totalling 0.26 carats, bezel set with 67 brilliant-cut sapphires, beaded crown set with a diamond with a truncated pavilion totalling 0.2 carats, rhodium-finish steel sword-shaped hands. Blue alligator-skin strap, white gold 750/1000 double adjustable folding buckle set with 43 brilliant-cut diamonds totalling 0.43 carats. Mysterious complication with mysterious display of the hour and minute hands, skeletonised bridges forming Roman numerals set with 372 brilliant-cut diamonds totalling 1.29 carats. Individually numbered movement consisting of 192 parts including 27 jewels. Movement diameter: 33.6 mm, movement thickness: 6.15 mm, balance: 28,800 vibrations/hour, power reserve approx. 48 hours. Sapphire crystal and case back. Case thickness: 11.9 mm. Water-resistant to 3 bar (approx. 30 metres).