Cartier Ballon Bleu

Released in 2007, the unmistakable Cartier Ballon Bleu is an elegant and balanced timepiece from Cartier. Its round shape makes it stand out from square Cartier watches such as the Tank and Santos. Some models are adorned with blue sapphire, and the dial set with diamonds. Like all Cartier watches, the Ballon Bleu features Roman numeral hour indexes.