1960s Cartier Very Rare Tank Basculante "Jumbo" with EWC Cal.6 in 18K Yellow Gold

Very rare Tank Basculante jumbo size with Cal.6 made by EWC, 18kt yellow gold model, manufactured in 1960's by Cartier. It has a jumbo case, which is very rare among the rare Basculant watches. The case width is 23mm and the belt width is 18mm, while the normal size is 20mm case width and 16mm belt width. It is equipped with a rare Cal. 6 made by EWC (European Watch and Clock Company). The watch comes with an 18kt yellow gold bracelet with a unique design and excellent workmanship.