Originally Posted by Gordy748

I remember they had the checkerboard paint before the art décor came out. Colnago did make SLXs during the 80s, it was the model below the Master, and given the curved forks 1986 is a reasonable guess. That said, Colnago never stamped the dropouts with the frame material nor a serial number. If it's real (and I think it is) then those are post-manufacture.