Ken Toda wrote:
> Also, if I may add this fact, our list concluded that the
> with cable-stop Record was available till mid to late 70's
> with "C" retaining ring type which came out around 1972,
> also you can see "round" pivot (upper) base sticks out at
> front face (sideway of letter "V").
Stevan Thomas replied:
> My recollection is that was a suspect derailleur. Anyone
> could have made that one up using parts.
I don't see how - the upper pivot grooved for the snapring could possibly be retrofitted to an old body (though I doubt it), but the other characteristic Ken mentions - how the aluminum base for the steel pivot protrudes forward more on the newer ones than on the old - that could not be changed. Nor could the housing stop be added to a newer body with the snapring pivot and protruding base - it's all one piece.
I took a snapshot of both kinds to illustrate; it's at:
http://bulgier.net/
The upper one in the pic has the flat pre-CPSC cage but the steel pivot pin is extended and grooved for the snapring. So I guess this dates it as between around '72 and '78 or so?
Fun Facts: The old one, about a '61 I think, has chrome-plated parallelogram arms, and the body pivot pins, which are pressed-in steel on the newer one, are aluminum on the old one. They are machined out of the same block of metal as the body, not separate parts pressed in.
Mark Bulgier
Seattle, Wa
USA