Velo-Pages is your friend when it comes to the need for information likely found in any number of vintage lightweight component catalogs - most especially when it comes to Huret:
Thereafter, you can take your choice of years regarding Jubilee specifics:
1972 http://www.velo-pages.com/main.php?g2_itemId&41&g2_imageViewsIndex=1 (fitting instructions - diagram) http://www.velo-pages.com/main.php?g2_itemId&44&g2_imageViewsIndex=1 (fitting instructions - description in English)
1973 http://www.velo-pages.com/main.php?g2_itemId$67&g2_imageViewsIndex=1 (exploded diagram - short cage) http://www.velo-pages.com/main.php?g2_itemId$70&g2_imageViewsIndex=1 (exploded diagram - long cage)
1974 http://www.velo-pages.com/main.php?g2_itemId%59&g2_imageViewsIndex=1 (exploded diagram - short cage) http://www.velo-pages.com/main.php?g2_itemId%62&g2_imageViewsIndex=1 (exploded diagram - long cage)
1978 http://www.velo-pages.com/main.php?g2_itemId'72&g2_imageViewsIndex=1 (exploded diagram - short cage)
If you were to take the time to compare the individual part numbers with respect to the short and long cage versions of the Huret Jubilee rear derailleur as produced through the years, you should be able to confirm the fact that, indeed, the only real difference between the two models involves the pulley cage assembly itself (...assuming a common frame fitting interface, for which there were also distinct model designation differences).
Robert "Hip, Hip, Huret" Broderick ...the "Chronically Cloudy Clime" of Oregon Portland, USA
P.S. Unlike most forums with which you may be familiar, the CR List requires that all postings be accompanied by the author's full name (...i.e. first AND last), along with their city, state / province, and country of origin (...without abbreviation or cute contractions UNLESS the primary information is still clearly spelled out - in other words while my sign-off above may pass the sniff test, it would NOT do to merely say "sunny LA", or "Motor City", or "the Big Apple" unless you also then clearly typed out the respective city name because foreign members are not always up to speed on such U.S. colloquialisms). Failure to abide this convention may well result in your suspension and/or automatic removal from the CR List at the behest of Listmeister Dale - so please consider yourself gently and respectfully informed....
> Date: Fri, 12 Feb 2010 17:36:34 -0800
> From: firstname.lastname@example.org
> To: email@example.com
> Subject: [CR] Huret Jubilee
> I recently came into possession of a full Huret Jubilee set; both the front and long-cage rear derailleur look NOS (after some polishing), but it's clear that I need to do something with the jockey wheels as they feel very crunchy.
> I was wondering if anyone has a link to an exploded diagram of this derailleur? I don't want to disassemble without one, I've heard these derailleurs have a propensity to explode into a mass of springs and tiny screws if one isn't careful.
> Also wondering if anyone has made a side-to-side comparison with the short-cage. I assume the mechanism is the same, only the cages differ?
> John Ferguson