Ladies 18 carat gold on 925 sterling silver vintage Must de Cartier Tank hand  mechanical wristwatch. This watch keeps perfect time. It has a new non Cartier black leather watch strap with the original Cartier buckle.It has a new crystal.The watch has its original seventeen jeweled signed Cartier movement . The watch also has its original blue cabochon crown. The dial is black with original gold hands. The width of the watch case is about  20mm and the height is about 28mm.