This Cartier Ballon Bleu, reference WE902031, is a 36mm case in Steel used condition, featuring a Silver Diamond dial, a Smooth bezel, a Steel and Rose Gold bracelet. This piece is customized — aftermarket-modified (setting or dial added outside the manufacturer); not original factory condition. Priced dealer-direct and shipped fully insured.
Think of the Ballon Bleu as Cartier's most liquid contemporary play. Launched in 2007, expanded fast across sizes and metals, with skeleton and tourbillon versions arriving within the first decade. For most buyers the steel and two-tone quartz references are the accessible doorway. Stick with 36mm for the broadest exit. Quartz costs meaningfully less than automatic, two-tone runs above plain steel, and the W6920047 sits at the upper end of that logic. Read the full Ballon Bleu buying guide ›
Start with the shapes. Cartier's identity sits in case design, not movement innovation, and the Santos, Tank, and Ballon Bleu prove the point. The brand traces to Paris in 1847, jeweler to royalty before it stood beside the watchmakers. It holds a rare dual seat in haute joaillerie and collecting. On numbers: full-set Tank and Santos hold strong. Gem-set pieces follow condition and rarity. Wire beats card, and I price at trade. Browse all Cartier ›
Cartier · WE902031
Customized — aftermarket-modified. Diamond setting or dial added outside the manufacturer; not original factory condition.
Cartier Ballon Bleu, Steel, 36mm case, Silver Diamond dial, Smooth bezel. Custom / aftermarket-modified — not original factory condition.
