[CR]American Classic seatposts

Example: Racing:Roger de Vlaeminck

From: "David Bilenkey" <dbilenkey@sympatico.ca>
To: "classicrendezvous-bikelist.org" <classicrendezvous@bikelist.org>
Date: Sun, 16 Mar 2003 11:25:58 -0500
In-Reply-To: <001e01c2ebc6$5b4166e0$41e50044@elman1>
Subject: [CR]American Classic seatposts

Eric Elman mentioned in his for sale posting:
> 27. American Classic seatpost, used. Very good condition, top 5" of post
> are clean, light insertion marking below that, 27.2 I don't know anything
> about these but it came on my ~1975 Ron Cooper so presume it is from that era.
> $10

I have what I think is an older one of these. Can anyone fill in the details on the history of these posts?

A Google search led me to this: http://www.bikepro.com/products/seatposts/amclas-post.html

And interestingly the one I have doesn't have this type of section for the main portion of the post, and it seems to have a red plug in the top. Does this tell us anything about age? The current American Classic website makes no mention of the history.

David Bilenkey
Ottawa, Ontario, Canada