Yes, it is a hideous repaint. From what I can see the headbadge is held on with double sided tape, which dates it post 1979-80. Further the bike appears to have under BB cable guides so it would be after before 1981 maybe 1982. The Campy dropouts where on the 1980 models 910-930 (Columbus SL tubes), 710-730 (531 tubes) and 510 (Ishwata 022); not on the 1981 models, but show up in the 1982/83 but only the 728/720 (Reynolds 531/531C) came with double eyelets and short point lugs (by 1984 the Campy double eyelets are gone). Since the earlier models (1979-1980) came with the Nikko Sangyo seamless long point Italian cut lugs and your bike having the shorter lugs and the 1983 720 had canti-lever brake bosses, I would say yours is the 1982 728.