So I bought a bike tonight. The previous owner is a very fit 79 year old who used to race with it. He purchased it used in 1976 and thinks that it is a 1970 model. The features don't quite line up with what is described here. It has most of the features of the 1971 model including the cutout on the bottom bracket, but it doesn't have the clubs on the fork crown. It has the hole in the lower point of the seat lug, which this says 1971 is the last year.

It has all the original Campagnolo equipment except the bottom bracket was replaced with a Shimano about 15 years ago and the brakes say Universal CX on them. The levers are Campagnolo though. I have a Campy bottom bracket I pulled off of my Raleigh I can put on it.

Velo-Retro: Colnago Super Timeline

1970
- Fork crown (investment cast) semi-sloping, flat front and back with two holes in the points at each side
- "Playing card" club decal graphics (inspired by 1970 Milano-San Remo victory)

1971
- Fork crown with clubs in top and two holes in each side
- Fork tangs narrow, no cutouts (or rarely no tangs)
- Club cutouts in all three lugs but club in lower head lug is now larger
- Hole in lower point of seat lug (last year)
- Bottom bracket shell with club cutout