I think the one thing you can be confident of is that it's not a Colnago!
Some observations... I think it's not likely to be a commonly imported Japanese made frame of the 80s. The components like Galli and Stronglight weren't commonly spec'd outside of continental Europe. The fork ends appear to be Columbus units, which again makes it more likely to be European in origin. The horizontal rear dropouts look to be either Campagnolos or a copy. The length of the slot puts the age of the bike maybe in the early 80s? I don't think it was ever designed as a racing frame. The fork clearance looks to be massive. The lugs and BB look to be fairly plain, stamped units. Not high-end at all. The seatpost diameter indicates a range of wall thicknesses on the seat tube that is more like 70s-80s than later. From memory it's consistent with Columbus Cromor/SL/SLX of that era. If you can take the seatpost out and shine a torch down the seat tube: can you see spiral grooves down near the BB? If so, then it's pretty likely you've got Columbus SLX tubes which would be a score. But I think that's unlikely given the overall impression of the frame.
My best guess: European made mid-range road frame from the early 80s. Enjoy it for what it is. Worthy of a repaint, but don't get carried away.