It is a Reparto level frame, probably from '82. '79-'80 had the chrome head lugs and some in '81 as well. If the rear brake bridge has a "box" shaped center where the bolt goes through that started in late '81 or '82 I think.
They were sold as framesets and called Specialissima, or built up complete as Super Leggera and Super Corsa.
They are really nice frames. I would build it up with Super Record from the era. I do not buy into the "polish" theory, Modolo is mostly junk in my book.