It's a city bike seat post clamp, for frames with a cuff at the top and the correct size. There were at least two sizes available, and I have one of each. The finish seems to be notoriously poor on them.
Mark Agree Southfield, Michigan, USA ~ ~ ~
Date: Wed, 23 Jun 2010 23:53:28 +0000 From: Tom Harriman <transition202@hotmail.com> Subject: Re: [CR] Curious Campagnolo Clamp To: _seaneee175@gmail.com_ (mailto:seaneee175@gmail.com)
Hi Sean.
It looks to me like a seat post clamp. While these are very common on mountain bikes, this is the first one I have seen by Campy. For several decades seat post were often in the range of 25.4 to 26.4 before the industry settled on the the standard 27.2 around 1990. In my experience these don't have allot of grip, and I would never use this for either a handlebar or a stem. Good luck with finding a buyer for this.
Tom (safe handlebars & stem) Harriman San Francisco, Ca
> From: seaneee175@gmail.com
> Date: Wed, 23 Jun 2010 13:03:46 -0700
> To: classicrendezvous@bikelist.org
> Subject: [CR] Curious Campagnolano Clamp
>
> Say that three times fast.
>
> At any rate. I came across this Campagnolo clamp some time ago. It was
sold to me as Handlebar Clamp, which I dismissed thinking it was a seat
tube/seatpost clamp. Dug it out the other day and put it in my "fund a new bike
pile". Took a good look, plus some measurements and it's 25.4mm inner
diameter, 1", which puts it around the stem area. So now I'm confused as to
what it really is.
>
> The clamp body is steel, stamped with the world logo. There is not type
of plating on it, just bare steel. The QR mechanism looks to be crudely
nickel plated. Both the lever and the nut have campagnolo stamps. The lever
has raised bumps around the campy wordmark, but no "open c". Pics can be
found here:
>
>
http://www.flickr.com/
>
> There is also a small "C" stamped into the main body.
>
> My thought is it might be a headset clamp custom made for someone or
possibly something from a town bike or folder.
>
> Any thoughts?
>
> Sean Flores
> San Francisco, CA
> USA