Cartier Tortue Monopoussoir 2356, 2000s 18k gold tonneau case, display back, monopusher integrated in the crown. White dial with guilloché finishing, painted roman numerals. Hand-winding movement. Cartier leather strap and Cartier 18k gold deployant buckle. Size: 43 x 34 mm. Notes: The caliber 045MC has been co-developed by F. P. Journe, Denis Flageollet and Vianney Halter.