Etceterini; Small Italian race cars built from 1937 to 1965

[Oldfart]

Number plate maybe won't help, as you get a new one when you change address (arondisement) or owner.
It's a reason why chasing factory French rally cars (in my case Alpines) and histories becomes very blurred, might be a particular car with a new custodian, might be a totally different car. Sorry for going OT.
EDIT, I'm unsure that's a French plate. I have just gone through all the clubs photos on their website for 2019(none of the car in question, but lots of cool cars) and many of the older cars have plates like this one.