The Campagnolo 5 speed chain guide is a stock item. I had 5 of them I bought from Euro-Asia back in the late 70's. Unfortunately, I haven't any left that I can find. I was just talking about these things the other day with someone, but I forgot who. They are great for TT bikes of the "old style" where you ride your road bike with a single chainring and a bunch of light parts and wheels.
La Mesa, CA
> From the July/August 1963 issue of Le Cycle:
> A review of the technical aspects of the Tour de France. (The Tour
> was won by Anquetil, first year of trade teams after the national
> team formula was abandoned. Anquetil used the new plastic Simplex
> derailleurs for the second half of the Tour.)
> Fabiero Masi (sic!) appears to have been there as part of the Ignis
> team of Baldini. The Ignis guys were particularly proud of Baldini's
> TT bike, which despite having a 61 cm frame, weighed only 7400 grams
> (16.3 lbs.) (no, I haven't weighed the bike, and I doubt the weight
> was independently verified). Lots of cut-outs, diminished lugs, and a
> single chainring (54T) at the front.
> Interesting is a Campy chain guide, which prevents derailing the
> chain (a common problem with single chainrings and many cogs on the
> Has anybody ever seen such a device? There is a Rebour drawing, but
> no photo. Looks like a smaller version of a front derailleur cage,
> adjustable sideways. A little knob at the end to prevent the chain
> from slapping and going under and out of the cage. It clamps to the
> seat tube. Campy logo in the usual place. (Maybe this was a custom
> piece made by Campy for this bike?)
> All the info, plus the dozens of Rebour drawings of various bikes and
> details will be seen in a future issue of Vintage Bicycle Quarterly.
> (VBQ isn't only about randonneuring!) Rebour offers a rare look into
> the technology of the Tour bikes from various makers.
> The same magazine has an ad for the new Mafac Top 63 and Driver
> cantilever brakes (so they probably were introduced around then), and
> the TA ad mentions cranks and bottle cages.
> A Campagnolo ad says "Vicenza (Italy), Cognin (Savoie)" and lists a
> distributor in Paris. So the French connection (whatever it was) was
> alive and well. (According to Ernest Csuka of Alex Singer, FB also
> was located in Cognin.)
> Jan Heine, Seattle