“Bleu de Cartier” is a renowned collection of luxury watches and jewelry created by Cartier. This collection is recognized for its elegant design and often incorporates distinctive blue elements. The Ballon Bleu model, in particular, is a notable part of this collection, featuring a round case and a signature blue cabochon-shaped crown. Cartier’s Bleu de Cartier collection reflects the brand’s commitment to craftsmanship, sophistication, and timeless style. For specific details on models and availability, it’s advisable to check Cartier’s official sources or consult with authorized dealers.