well, thanks for the pics, now I wish I could offer an answer but I've got nothing. The seatstays are the single-taper style, and the top-tube cable guides and Campy (Campag) BB guides all point to a late 70s timeframe. Unfortunately, the lugs and stay-caps and even the shift-lever stop aren't distinctive of any maker in particular, but the plain square-cut BB shell and simple tube chainstay bridge make me think it was a mass-produced frame. I'd ask for a shot of the brake bridge and the rear drop-outs.