I have come across another JUY 52 - it is absolutely identical to a JUY 51 except for the mounting bolt - I don't know what the explanation is for the different markings...
Hilary Stone, Bristol, England
> From: Newag@aol.com
> Date: Sun, 29 Jan 2006 10:41:30 EST
> To: classicrendezvous@bikelist.org
> Subject: [CR]Juy 52 (Jonathan Agnew)
>
> Could someone please provide identifying information about the Juy 52 rear
> derailleur?
>
> This pertains to a chrome ("chromovelato?") Torpado with a JUY 52-marked
> fixing bolt that currently mounts a later retrofit Campy derailleur. Front
> derailleur FYI is a JUY 53, shifters are twin/right side shifters, one of
> which
> appears to be a custom replacement.
>
> In what ways does the JUY 52 differ from the models it most closely
> resembles? What is the best substitute/replacement? If you have source
> information
> (catalogs etc.) or an actual JUY 52 I would be most grateful for
> pictures/copies.
>
> Many thanks,
>
> Jonathan Agnew
> Darien, CT