The Balilla brake levers and the French derailleur say it's old (way older than Cannondale). Old enough that the equipment is probably only partly original (so the Shimano rear derailleur is irrelevant), and that the build spec is inaccessible. That means we can't say anything about the frame maker based on the parts. The only way we're going to be able to say something about the frame is to see pictures of the frame.

So, come back when you have some.