Not to side track too much. Ok I will address the topic: I don't have a focused collection. I think it will find me. I have too many wheel sets and maybe too many parts but it is a wide range and acquired haphazardly. One of those was a grab bag of Campy parts for $75. In it were a couple of NR RD's Don't remember the Pat dates but here is a comparison. Still need to clean them up!
[IMG]
P1010353 by
superissimo_83, on Flickr[/IMG]
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P1010356 by
superissimo_83, on Flickr[/IMG]
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P1010358 by
superissimo_83, on Flickr[/IMG]
I will leave it to you to find Waldo (differences)!