Breitling · Automatic

Chronomatic 12

One of the first automatic chronographs, developed from 1966 by Breitling, Heuer-Léonidas, Dubois-Dépraz and Büren under the name Project 99, and launched in 1969. A Dubois-Dépraz module sits on a Büren micro-rotor base; because the module occupies the right-hand side of the movement, the winding crown moves to the left. The 12 is the slightly revised successor to the original calibre 11.