Cartier Ballon Bleu vs Tank

The Ballon Bleu (2007) and the Tank (1917) are Cartier's two most popular dress watches — and they target almost exactly opposite aesthetics. The Tank is angular: a rectangular case with the iconic brancards, Roman numeral chapter ring and railroad minute track. The Ballon Bleu is rounded: a perfect circle with a distinctive cabochon-protected crown set into an asymmetric notch in the case. The Tank reads as classical, masculine and historically grounded. The Ballon Bleu reads as feminine, contemporary and architecturally distinctive. Both are excellent choices for a buyer who wants a Cartier; they appeal to entirely different sensibilities. The Tank Solo on leather trades $4,000–$7,000; Tank Louis Cartier in 18ct gold trades $10,000–$15,000; Ballon Bleu 36mm in steel trades $4,500–$6,500; Ballon Bleu 36mm in 18ct rose gold trades $13,000–$18,000. The Ballon Bleu is statistically more popular with women collectors; the Tank skews slightly more towards men, though both have crossover appeal across genders.