Re: [CR]Re: 1970's frame dating by Columbus tubing decals?

(Example: Framebuilders:Dario Pegoretti)

Date: Tue, 02 Oct 2007 11:31:56 -0500
To: 'Classic Rendezvous' <Classicrendezvous@bikelist.org>
Subject: Re: [CR]Re: 1970's frame dating by Columbus tubing decals?
References: <b27bc5c00710011635h15b52657yfb9691d5ed185c34@mail.gmail.com> <b27bc5c00710011942u5db9be96mf5f2cfe8b7ec8cfb@mail.gmail.com> <000301c804e5$3019d3c0$6401a8c0@maincomputer>
In-Reply-To: <000301c804e5$3019d3c0$6401a8c0@maincomputer>
From: "John Thompson" <johndthompson@gmail.com>


Ken Freeman wrote:
> Tam, great page! Thank you.
>
> My Mondonico has the 1978 and after sticker with the blue frame and the blue
> background with white "columbus", and I've been confidently told that it
> can't possibly have a sticker with no tubing code letters on it!
>
> You list the tubing types that were available in the mid '70s. Have you
> discovered how to identify those tubing types, in the absence of tubeset
> type codes being on the sticker?
>
> Ken Freeman
> Ann Arbor, MI USA
>
> -----Original Message-----
> From: classicrendezvous-bounces@bikelist.org
> [mailto:classicrendezvous-bounces@bikelist.org] On Behalf Of Tam Pham
> Sent: Monday, October 01, 2007 10:43 PM
> To: Classic Rendezvous
> Subject: [CR]Re: 1970's frame dating by Columbus tubing decals?
>
> Thanks for all the good [offlist] comments so far. I've made some additions
> and changes to the page incorporating contributions from emails. If anyone
> has a good photo of original Columbus decals on their bike and don't mind
> emailing it to me I'd like to get a representative actual-decal photo for
> each of the samples to better represent the colors.

I have the generic SL/SP decals here:

http://www.os2.dhs.org/gallery/main.php?g2_itemId=10928

Also, an early 80s Columbus catalog with decals here:

http://www.os2.dhs.org/~john/catalogs/Columbus-tubes.pdf
> A couple of questions came up and maybe somebody out there knows. Does the
> color of the dove have any significance regarding the tubing type? Were
> there any names to the tubesets? Were there foil and non-foil versions of
> the same designs?

Columbus didn't distinguish between SL/SP during the on-topic era. The tubes themselves were marked with the wall thickness (e.g. 0.9/0.6 for an SL down tube) earlier with a stamp, later with graphite electrode. The markings were often lost when the tubes were trimmed and/or covered with paint after brazing.

--

-John Thompson (john@os2.dhs.org)
Appleton WI USA