Originally Posted by
Chombi
See my pic above of original Pat. 72 jockey wheel with brass sleeve and steel "innard"...Interesting enough, the no-name copy have similar "innards", except for the grease retaining groove on the sleeve which is missing on the replacement wheels...... I think you are correct about a change after a couple of generations later. IIRC, my Pat. 83 NR RD Jockey wheels do not have the same stuff in it..... I'll take a look at it when I get home this evening to confirm...
The definition of sleeve and "innards" is not clear, at least I am not sure which is which. A better way to say it is sleeve and busing I guess.
I always presumed the pulley with a steel sleeve and a brass busing to be the early ones...
What you have pictured is what I presume is the later version... a brass sleeve and steel busing. I have always wondered what year this change occurred and always been somewhat surprised that there is little discussion about it. With people going to great pains to have period correctness I would imagine having the bass busing type pulley on a "patent" derailleur to be an important detail.
The other possibility is that one is record and the other is not. I don't know the answer.
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1 Super Record bike, 1 Nuovo Record bike, 1 Pista, 1 Road, 1 Cyclocross/Allrounder, 1 MTB, 1 Touring, 1 Fixed gear