Ballon Blue de Cartier 39 Flying Tourbillon Pink Gold / Grey

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. The Extra Flat 46mm was introduced in 2011, while the Extra Flat 40mm was introduced at SIHH 2015. Reference W6920104 has a pink gold case of 39mm, which houses its hand-wound caliber 9452MC with flying tourbillon. The dial is grey.