Well I was gonna say for sure a repaint, then I see that has already been established. OP, no doubt that’s a real Colnago and I think you will enjoy that bike. It’s a very cool machine! As far as dating/ identification, it looks to be no earlier than 1983-84 to me. A Super has a linear crimp along the inner chainstay. I’m not sure I see one on yours, but pretty sure I see wheel/crank crimp which is not feature of an early 80’s Super and not sure if it is found on later versions.
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N = '96 Colnago C40, '04 Wilier Alpe D'Huez, '10 Colnago EPS, '85 Merckx Pro, '89 Merckx Century, '86 Tommasini Professional, '04 Teschner Aero FX Pro, '05 Alan Carbon Cross, '86 De Rosa Professional, '82 Colnago Super, '95 Gios Compact Pro, '95 Carrera Zeus, '84 Basso Gap, ‘89 Cinelli Supercorsa, ‘83 Bianchi Specialissima, ‘VO Randonneur, Ritchey Breakaway Steel, '84 Paletti Super Prestige, Heron Randonneur