Bob, As the current owner of 12 Colnago's and having owned dozens more I can safely tell you there is little/no rhyme or reason regarding serial numbers. The age-telling details are but not limited to cable guides, seatstay caps, chain stay stampings, lug & crown drillings and clover cut outs, drop-outs and so on. Additionally, one can only guess if Colner and Rauler frames followed traditional Colnago build details.
I spent the morning working on my Colnago stable in preparation for the Velo-Rendezvous that is in 2 weeks! I plan to spend the rest of the afternoon with a light minty green Super from 1978 I have owned since circa 1980.
Regards, Matt Gorski Belmont Shore, CA USA
>From: Bob Freitas <freitas1@pacbell.net>
>Date: 2007/09/08 Sat PM 03:23:37 CDT
>To: CLASSIC RENDEZVOUS <classicrendezvous@bikelist.org>
>Subject: [CR]Colner/Colnago serial number
> I am cleaning up my Colner frameset and could not find a serial number,
>only "Piazza" stamped in the BB shell. Any ideas?
> BOB FREITAS
> still gray skies in MILL VALLEY ,CA USA