Regarding the Yellow Colnago,
I have one exactly like it. Same crown and everything. I call the few bi kes like this I've seen (this makes 3 now) a 1969 model. If one traces t he known refinements backwards from well known bikes and their dates; bi kes detailed like this (3 small cutouts in lugs, holes drilled in BB in a circular pattern, pre investment cast fork crown) end up about 1969 or thereabouts.
Nice bike for a redo.
Brian Baylis
La Mesa, CA
The braze-on shift bosses, cable guides, water bottle bosses, and rear d er
cable stop could have been added later, which would argue for earlier. The
clamp cable routing on the bottom of the downtube certainly tends to mak e one
think it is earlier than 78. I don't know when Colnago started using b raze-on
cable routing. Below is the last version of dating I found in one of C huck
Schmidt's posts. I don't know who to attribute the compilation. If t he
braze-ons are original, then I would narrow it to 77. Lou Deeter, Temp orarily in
Scottsdale, Arizona
======================== ======== Colnago Frame Dating, Version VI ======================== ========
1969 and earlier? 1969 -- Playing card decal graphics 1969 -- Fork crown (sand cast) with two holes in each side 1969 -- Fork tangs wide, no cutouts 1969 -- Club cutouts in all three lugs 1969 -- Bottom bracket shell with drilled holes in circular pattern ---- 1970 -- Fork crown (investment cast semi-sloping) with two holes in
each side 1970 -- Club cutouts in all three lugs but club in lower head lug is
now larger 1970 -- Bottom bracket shell with club cutout ---- 1971 -- Fork tangs narrow, no cutouts ---- 1972 -- Club/COLNAGO decal on head tube/seat tube (seat tube Worlds
bands) and COLNAGO on down tube 1972 -- Fork crown with clubs in top and two holes in each side 1972 -- Fork tangs with two holes (sometimes three holes) ---- 1973 -- Wreath seat tube decal with two Worlds bands 1973 -- Fork crown with clubs on top but no holes in each side 1973 -- Water bottle braze-ons on downtube ---- 1974 -- Fork tangs with club cutouts 1974 -- Club cutout in lower head lug only 1974 -- Shifter braze-ons on down tube ---- 1975 -- Vertical COLNAGO seat tube decal with diagonal worlds stripes ---- 1976 -- Fork crown with COLNAGO added to clubs on top 1976 -- Short Campagnolo dropouts ---- 1977 -- Top tube cable guide braze-ons ---- 1978 -- Fork crown for recessed brake bolt with shallow triangles cut
into back 1978 -- Brake bridge for recessed brake bolt 1978 -- Short COLNAGO drop-outs ---- 1980 -- Fluted seat stay caps engraved COLNAGO and straight seat
stays, no longer biconical 1980 -- Brake bridge with cast square boss for recessed brake bolt ---- 1981 -- Chain stay bridge is small spool shape, no longer tube ---- 1982 -- Chain stays stamped COLNAGO on sides 1982 -- Cable routing on underside of bottom bracket ---- 1983 -- Aerodynamic fork crown
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