Pre-owned Cartier Ballon Bleu ref W69009Z3 is one of the most recognizable modern Cartier watches and a model that has become a favorite among collectors worldwide. Introduced in 2007, the Ballon Bleu was a departure from Cartier’s traditionally angular designs like the Tank and Santos. Instead, it embraced a soft, rounded silhouette that is elegant and contemporary. The collection takes its name from its balloon-like profile and the signature blue cabochon crown integrated into the side of the case. Rather than protruding from the watch, the crown is nestled within a graceful protective arch that interrupts the Roman numerals on the dial, a design detail that has become synonymous with the Ballon Bleu. Many collectors are drawn to the Ballon Bleu because of its elegant round shape. The curved case, flowing lines, and balanced proportions give the watch a softer appearance on the wrist. Shop Cartier Watches Shop Cartier Ballon Bleu Watches