Cartier Rotonde de Cartier Minute Repeater Mysterious Double Tourbillon

Cartier's Rotonde de Cartier Minute Repeater Mysterious Double Tourbillon, reference WHRO0023, has a 45 mm case. The titanium case is 11.15 mm thick and has a sapphire crystal and a display back. Caliber 9407 MC is a manual-winding movement with 448 parts, 45 jewels and a power reserve of about 84 hours. The watch has a minute repeater and a mysterious double tourbillon. Both the watch and the movement are certified with the Poinçon de Genève. A black "Gomma" alligator strap is fitted, with a double adjustable folding buckle in white gold. Cartier rates the case to 30 metres. The watch is a numbered limited edition of 50 pieces.