Joined: Sep 2005
Posts: 3,006
Likes: 306
From: Hervey Bay, Qld, Australia.
Bikes: Colnago (82, 85, 89, 90, 91, 96, 03), 85 Cinelli, 90 Rossin, 83 Alan, 82 Bianchi, 78 Fountain, 2 x Pinarello, Malvern Star (37), Hillman (70's), 80's Beretto Lo-Pro Track, 80's Kenevans Lo-Pro, Columbus Max (95), DeGrandi (80's) Track.
I thought your seat stay tops, with the 'Colnago' cast into the plug showed me that your bike was probably a 83, 84, 85 build. I would guess at 1984. There was also another seat stay cap in use in 1983 and your caps were the updated version.
If your frame's decals are original, I looked at the Columbus Decal which indicated that your frame was probably made out of Columbus SL tubing which was typical of a common Colnago 'Super' model. If it was a Columbus SLX decal I would have suggested a Superissimo model. The difference between a Super and a Superissimo is the tubing material. I don't go much on the amount of chrome used on a Colnago frame or where the chrome might be found as frames of this era could be ordered with your choice of finish no matter what the model.
Needless to say, dating a Colnago and identifying the model is not an exact science.
The sloping front fork crown, single point head tube lugs, etc, all add to the story of a Colnago frame.