Description: Ballon Bleu De Cartier Watch Pre-owned Ballon Bleu De Cartier Watch ref W2BB0037 (2025) is distinguished by an elegant, round case, Cartier’s famous Roman numeral dial with sword-shaped hands, and a blue cabochon crown. However, while most brands feature the crown on the outside of the bezel, the Ballon de Cartier envelopes it inside the bezel in its own protective bubble. The result is a classic round watch that stands apart from other offerings