42mm skeletonized Cartier Rotonde de Cartier Heure Mystérieuse watch. 750/1000 rose gold case with a cabochon sapphire on the pearlized 750/1000 rose gold crown. Sword-shaped gold-plated steel hands. Dark gray semi-matte alligator strap with interchangeable rose gold 750/1000 deployant buckle. Mysterious complication with Roman numeral skeletonized bridges and movement grille inrose gold 750/1000. 181 piece mechanical manual-winding movement with 27 jewels. 36.7mm diameter, 6.15mm thick. 28,800 vibrations per hour. 48 hour power reserve. Sapphire crystal and case back. Water resistant to 3 bars (approximately 30 meters).