Heuer montreal calibre 12, ref 110.503BC

The Heuer Montreal is powered by the famed calibre Heuer 12 automatic (the microrotor is hidden between the base plate and the chronograph module).

The movement was the first automatic chronograph ever commercialized in 1969 and was manufactured by the join venture Heuer, Breitling, Hamilton and Duboiz Depraz for the chronograph module.


Heuer montreal 110.503BC

Rarest version
ref. 110.503BC, full blue dial(without the inner white circle), white sub-dial and red markers.

Calibre 12 automatic

Year circa 1974

Fully serviced in June 2019

Provided with an nsa bracelet and a blue leather bracelet

110.503 BC