Thanks for the info Don.
Based on some supplementary info from Bob Hanson I'm going to go for item 320118255748 . Living in London it can be quite difficult to get second hand old bikes so getting an Allvit from one may be difficult, all the couriers are snapping them up to build fixed wheels out of them (probably throwing away all the unwanted components in the process). The 70s Huret I pointed out is the same as one of the late 70s Raleigh parts that were used as replacements when the originals were damaged, it's useful to know that it a Challenger as unlike the Allvit it doesn't have it written on the outer plate.
Best regards
Julius Naim London, UK
On 27 May 2007, at 05:09, Donald Gillies wrote:
> I think that one of the nicest mid-60's derailleurs was the Huret
> Svelto, although it may not work as well as the allvit, which has a
> mechanism that, like the Suntour slant pantograph, follows the contour
> of the freewheel. The svelto is basically a steel and earlier version
> of the huret jubilee. I tend to buy them for < $10 from ebay or
> from adverts on the iBoB list.
>
> It's easy to get an Allvit from any Raleigh Sprite 5-speed or 10-speed
> city bike (the model name might be slightly different in the U.K.)
> The mid-70's Sprites had red jockey pulleys which would need to be
> replaced to be accurate. The advantage of using this source is that
> there are many garage queen raleighs of this type and you have a good
> chance of getting a gear system that looks NOS.
>
> The 2nd auction with an Allvit does not work any more - the auction
> has been removed by ebay ~ but I'm assuming its a newer allvit with
> the red pulleys.
>
> I noticed that you pointed out a Huret Challenger 70's derailleur (the
> type that looks like a trapezoid when viewed from behind the bike,
> with a black lower pivot.) I think these were introduced in the early
> 1970's ~ they first appeared on US raleighs in 1974, and would not be
> period correct for your bike. However, there are some versions in
> titanium which might be cool to own.
>
> - Don Gillies
> San Diego, CA