Btw: You can see the name of the original intended company have been removed on the movement bridge.
The same may be found on some Excelsior Park Monte Carlo versions. Apart from the case back and dial it spears identical to the EP.
Other EP Monte Carlos have Breitling still signed on there. The reason is said to be that these watches was made partly using leftovers from the Breitling bankruptcy in the late 70s. Valjoux is said to have been stuck with batches of Breitling badged movements which they subsequently sold to others after big B stopped paying.