I'll contribute here if anyone can tell me if this one is properly assembled. It was original equipment on an early-80's Trek 720 and had been replaced with a Deore; it was in pieces and I think this is how it all fits but I'm not sure. It's a Sachs-Huret Duopar and is this the titanium model? The rear plate on the cage has a bluish tinge and I've never seen metal jockey wheels like this before.



More pics here:

http://s270.photobucket.com/albums/j...uret%20Duopar/