For sure the fork is a Super fork. Yes, frame may have been refinished, but if the numbers match frame/fork, the frame is a Super. A Mexico from the same era had the sloping fork crown and the first creased/shaped tubing. This has neither. It's not a Superissimo and definitely not a Master. What does that leave?

I personally lean towards a repaint because from what I can see of the paint chipping it appears the entire frame's been chromed. Not typical of that era Colnago; my own '83 Mexico has chrome head lugs and rear triangle but the plating doesn't even cover the entire stays (paint chips prove this). Same with the main tubes, again revealed by small paint chips.

DD