It has a Columbus SLX decal which would typically indicate a Montello, but I think that's a red herring. It doesn't have an other other Montello features such as a bridgeless bottom bracket shell , internal brake routing or investment cast lugs. It has a front derailleur hanger but no pump peg and only appears to have a single set of bottle bosses, so I'd place it circa 1983-1985. Model is most likely a Treviso with Columbus SL, however we can increase the confidence by a couple of simple checks. What size is the seat post? Are there five helical ridges inside the bottom of the fork's steerer tube?
Last edited by T-Mar; 11-19-19 at 07:19 AM.