I have an original Paramount (November, 1967) which came equipped with plastic pulleys, but a higher tooth profile than the familiar NR/SR pulleys.
Also, it seems that some have an adjusting barrel, and some do not.
Aldo Ross
> David Goerndt wrote:
> >
> > Is there any definative way to date a "Record" rear derailleur? Is there
any
> > difference between a 1963 derailleur and one at the end of the
production in
> > 1973?
>
>
> I think the only change was outfitting the ones toward the end with
> plastic pulleys instead of the original smooth (no teeth) steel pulleys.
>
> Chuck Schmidt
> South Pasadena, California