Thanks Martin.
I'm up to speed on the arm dating, I was interested in the <c> ring.
Grant McLean toronto.ca
Subject: Re: [CR]Campagnolo chainring question
Hi Grant, Referring to my "The Vintage Bicycle Racing Newsletter", Issue #16, put out by Michael Kone in March 1998 a diamond/with a number inside the diamond,on the back of a Campagnola Record crankarm, indicates a 1970 vintage crankarm. Yours truly, Martin Walsh in Vienna,Va.
Grant McLean wrote:
> List,
>
> Anyone narrow down the date for these <C> logo inner rings?
>
> I recently purchased a NR crank, with <5> on the arms that has a 42T ring
> with
> the <C> stamp. The outer ring has "patent" stamp, and a pin.
>
> Grant McLean
> Toronto.Ca