Description: Cartier Ballon Bleu W6920052 Pre-owned Cartier Ballon Bleu W4BB0016 (2013 – 2023) takes one of Cartier’s most recognizable designs and adds a layer of mechanical complexity with a chronograph. The Ballon Bleu, introduced in 2007, is known for its rounded case, soft curves, and signature crown set into a “bubble” guard that flows seamlessly into the caseband. This model keeps that DNA but integrates chronograph pushers on either side of the crown, giving