Cartier Rotonde de Jour et Nuit with the larger 42mm 18ct solid rose gold case, silver dial with half Roman and Half Arabic numerals, unique rotating disk which shows the hours with a pointer from the sun (day time) or moon (night time). Transparent casebook exposing the Cartier Caliber 9903 automatic movement. Cartier blue sapphire cabochon crown. Fitted to a black Cartier leather strap with a solid 18ct rose gold double folding clasp. This limited edition watch comes with rare wooden Cartier box, wooden mahogany loupe, booklets and original guarantee. This rare watch had last known retail price of over £25,000!