Born from the Ballon Bleu de Cartier collection introduced in 2007, the WE902077 carries the line's hallmark rounded case silhouette and protective crown guard — details that have come to define the reference's character. The 33mm round case pairs stainless steel and 18kt rose gold, while scratch-resistant sapphire crystal protects the dial beneath.
The silver-tone dial keeps things refined, with diamond hour markers catching the light alongside the iconic Roman numeral XII. Blued-steel sword-shaped hands sweep across the face, nodding to design codes long associated with the Cartier maison. Driving the watch is an automatic movement, with hours and minutes displayed in clean analog fashion.
Secured by a hidden fold clasp on the bracelet, the WE902077 sits comfortably at 9.96mm thick — a measure that speaks to its everyday wearability. This example, dated to 2015, is offered with its original box and papers intact.
