The Cartier Ballon Blue line was introduced in 2007. It features a smooth, pebble-like case. One of its signature elements is the recessed & protected crown and the ‘dent’ it causes in the dial.Reference WSBB0015 has a stainless steel case with black ADLC-coating and a black dial. It is among the first Ballon Bleu models to be powered by Cartier’s own caliber 1847 MC.
