I believe you have a handlebar clamp or more accurately a handlebar
stem clamp. This would be for bikes with a slit in the steerer and
no wedge or bolt in the quill. Similar to the one on my Raleigh
Twenty folder.
http://www.BikeSmithDesign.com/
IIRC the Brits called them head clips.
http://www.flickr.com/
I find it very hard to believe that Campi would have made a seat clamp for bike with one inch seat tubes. Varsities anyone? The larger sizes probably were for seat tubes. The seat tube clamp on my R20 is just a scaled up version of the stem clamp.
This type of design has fallen from favor. However for people such as my wife who need very tall stems I believe there is weight to be saved over having a 10"+ bolt and wedge. Especially using a lightweight 1" BMX seatpost clamp. So I plan to use this on her next frame.
At 1:03 PM -0700 6/23/10, Sean Flores wrote:
>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/photos/assemblylinecollective/sets/72157624175487783/
>
>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?
--
Mark Stonich;
BikeSmith Design & Fabrication
5349 Elliot Ave S. Minneapolis, Minnesota 55417 USA
Ph. (612) 824-2372 http://bikesmithdesign.com