From Cartier, presenting the Ballon Blue de Cartier (ref. WE902031), a refined timepiece that blends thoughtful design with reliable performance. A study in proportion and durability: measuring 36.6 mm in diameter, with a thickness of 12.05 mm, defined by a round silhouette. The caseback is closed, and the crystal is sapphire, delivering water resistance to 3000 meters. The dial composition is deliberate and legible: a silver tone with guilloche finish, framed by gem-set indexes hour markers, and sword hands. Beneath the caseback lies dependable performance: the 049 No Date caliber. First released in 2007. Comfort and balance define the wearing experience, making it an easy daily companion. Subtle transitions between textures elevate the overall impression. For buyers researching specifications and real-world impressions, this reference stands out for coherent design, dependable mechanics, and lasting relevance within modern horology.