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Mid 70's Colnago Frame info/dating

Old 09-23-13, 03:08 PM
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dpicare26
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Mid 70's Colnago Frame info/dating

Not interested in an appraisal, as this is from a closed transaction here on BF:
https://www.bikeforums.net/showthread...ctc-TT-59cm-ST

What I would like to know is date/model/frame material.

From what I gathered, it's very difficult to date a Colnago. What I, and others, suspect, is that it is older than a '78, but younger than a '74. Also suspected to be a 'super' model.

somewhere around '75-'76, the word Colnago accompanied the 'club; in the fork crown. '73 was the first year Club cutout in lower head lug only. Also around '75, the drop outs changed from the 'long' style to a 'short'er length.

Anyone confirm/deny any of this? Further knowledge? Idea of which Columbus tubing used? I'm guessing '75 Super.

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Old 09-23-13, 03:30 PM
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I was speaking with some other members who think 73-74 based on the fork crown and bb shell.
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Old 09-24-13, 12:51 PM
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What specifically about the BB shell suggests 73-74? According to this source :https://www.classicrendezvous.com/Ita...ago_dating.htm there is a club cutout in BB from 1970-75.

also says there's a gray are between when the fork crowns had clubs only, and not the word "colnago". Somewhere between 72-75ish.
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Old 09-24-13, 12:56 PM
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Another member (who I hope chips in here) suggested that the thickness of the shell and the engraving suggested 73-74.
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Old 09-25-13, 03:30 PM
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Originally Posted by KonAaron Snake View Post
Another member (who I hope chips in here) suggested that the thickness of the shell and the engraving suggested 73-74.

Did he/she concur that it's probably a "Super"?
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Old 09-25-13, 03:55 PM
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Super or Mexico based on panto and tubing diameter.
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Old 09-26-13, 12:33 AM
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Concur with Aaron. Probably is not a '75 or older as the fork crown doesn't have "Colnago" pantographed with the clover.

Other giveaways that point to a max age of '74 are the thickness of the BB shell at the clover cutout, lack of oval windows at the front and back of the BB shell and the larger, "fluffier" clover in the lower head lug.

Here's a couple details from my '73 or '74 Super:

BB shell:



Later shells had two oval-shaped cutouts at the BB shell where the seat and down tubes slotted in, and the shells themselves were very thin - maybe a couple/three milimeters thick at the cutout edges. Note this earlier shell has no windows and is thicker at the cutout.

Lower head lug/fork crown:



Again, later versions of the fork crown changed the shape of the clover and added "Colnago" engraving around the edge of the crown beginning in '75. The clover cutout also changed to a different shape that was somewhat smaller, with a slightly thinner stem with a rounded vice flat bottom.

Like this:



That one is from a '78 Super - note the "Colnago" engraving on the fork crown, differently-shaped clovers (both on lower head lug and crown).

Note the thinner metal around the edges of the cutout in the BB shell and the oval window:



Another small detail on earlier frames is the concave seatstay plug. Earlier frames had a shorter plug - around 1.5" whereas the later plugs stretched out to nearly 2" or so. Even later they began sporting "Colnago" engraving on them as well.

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Old 09-26-13, 04:29 AM
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Thanks DD - was hoping you'd post

So seems like we're looking at 73-75 Super.
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Old 09-26-13, 05:47 AM
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I think '73 or '74. Why? I forgot you'd also stated the fork tangs had two round holes; it's common consensus that the small clovers in the fork tangs arrived in '75.

'73/'74 Super



'78 Super:



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Old 09-26-13, 06:47 AM
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Mine (actually dp's soon) looks nearly identical to that posted above DD...I think you're right on. Dang those levers look amazing!
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Old 09-26-13, 08:09 AM
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Thanks, Aaron

Btw, the frame material is likely SL, although since this is a rather large frame, it might also contain some SP as well. Supers had SL while Mexicos used Record tubing; the only real difference between the early Supers and Mexicos was the tubing used (lighter tubeset in the case of the Mexico).

OP: nice acquisition!

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Old 09-26-13, 11:08 AM
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I figured SP with the size of it...it feels light for a large frame to me, for what little that's worth.
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Old 09-26-13, 12:40 PM
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Originally Posted by Drillium Dude View Post
I think '73 or '74. Why? I forgot you'd also stated the fork tangs had two round holes; it's common consensus that the small clovers in the fork tangs arrived in '75.

'73/'74 Super

Thanks for the input DD! those are some sexy looking DT shifters.
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