Cartier, Blue Balloon, model: W6920063 automatic mechanical stainless steel 44mm single watch. The iconic blue balloon design The classic "balloon-shaped" case, paired with a synthetic sapphire crown on the right side featuring a protective bridge, is a signature design of Cartier. With a diameter of 44mm, the case and strap are made of interlaced gold (stainless steel +18K rose gold), which not only exudes the brand's elegant charm but also adds a sense of grandeur for men to wear. Equipped with a chronograph function, the dial layout is as follows: a 30-minute chronograph dial at 3 o 'clock, a 12-hour chronograph dial at 6 o 'clock, and a date display window at 9 o 'clock. It is complemented by blue steel hands and Roman numeral hour markers, providing clear and layered time reading. The silver-white sunburst dial paired with radial guillosel patterns is a classic detail in the Ballon Bleu collection. Equipped with an automatic mechanical movement, it supports chronograph function and has a power reserve of approximately 48 hours. With a water resistance depth of 30 meters, it is sufficient for daily wear to handle various waterproof scenarios in life.