I know breitling once did use motors movments but as far as I know they always had breitling signings and calibers.
Have come across this one with a miyota OC60 inside. Pretty sure it's a replica but breitling is not my forte so some confirmation would be appreciated
Breitling 59 is also a Miyota C3510 - can be found in the Navitimer Jupiter series...
Breitling 51 - based on the Miyota Y652 - also found in some odd Navitimers (Pluton), or some weird and rarely-seen series (Intruder, Academy)