Rotonde de Cartier watch

Rotonde de Cartier Minute Repeater Mysterious Double Tourbillon watch, 45 mm, Manufacture mechanical movement with manual winding, calibre 9507 MC. Rose gold 750/1000 case, beaded rose gold 750/1000 crown set with a blue sapphire cabochon, rose gold 750/1000 sword-shaped hands. Dark grey semi-matte alligator-skin strap (comes with an additional black semi-matte alligator-skin strap), interchangeable rose gold 750/1000 folding buckle. Minute repeater complication, Mysterious Double Tourbillon. Individually numbered watch, limited to 20 timepieces. Movement consisting of 448 parts including 45 jewels. Total diameter of movement: 39.30 mm, movement thickness: 6.05mm, balance: 21,600 vibrations/hour, power reserve approx. 84 hours. Sapphire crystal and case back. Case thickness: 11.15 mm. Water-resistant to 3 bar (approx. 30 metres).