Looks like a Legnano to me. That brake hanger was made by Universal specifically for Legnano, I know because it took me forever to find mine. It was common for Legnano to use Campy drops in the rear and stamped in the front - all the Gran Premio's are set up this way, however the fork crown looks different to me too. The headset looks like an original Way Assuato, which would jive with it being a Legnano because most came with them. To my knowledge only the Roma had Campy front and rear. I've seen Frejus with the same seat binder, but not ones as old as this one looks. There should be a serial number stamped into the seat tube, that might give you an indication of the year.

Anyways it's a fun score Randy, I can't enlarge the pictures on my computer right now, but when I can maybe I'll see something else.