“Bleu de Cartier” refers to a distinguished collection of luxury watches and jewelry created by Cartier, the renowned French jeweler and watchmaker. Known for its elegant design and often featuring distinctive blue elements, the collection reflects Cartier’s commitment to craftsmanship, quality materials, and timeless style.The Cartier Ballon Bleu is one of the well-known models within the Bleu de Cartier collection. Recognized for its round case and iconic blue cabochon-shaped crown, the Ballon Bleu has become an iconic symbol of Cartier’s watchmaking expertise.For specific details about models, features, and availability within the Bleu de Cartier collection, it’s recommended to check Cartier’s official website or visit authorized Cartier dealers.