I would guess this to be a 1972-74 Colnago Super. IF the front derailleurs is original, it dates from 1972-77 as it has the circlip but no CPSC lip. The wreath decal on the downtube was used from 1971-74. Of those years. only the 74 had brazed on shifter bosses, so this "may" narrow it down to 72-73. Check the dates on the top of the rear derailleur and the inside of the crankarms, as these may give more clues to the year.
The drillium chainring is original to the bike. The Clover-like design at each chainring bolt is typical of early Colnagos before pantographing.
