Chronomatic Group caliber Chronomatic 11

Cam switched chronograph movement made up of Buren caliber 1281 and Dubois-Depraz module 8510. It was among the first automatic chronographs when it was launched in 1969. With version -1, some flaws found in the early versions were corrected. Successor caliber 12 was introduced in 1971, however versions of the 11 would remain available until ca. 1973.