I have a Campagnolo Nuovo Record 144bcd, 54t outer chain ring marked Patent, that has the wider "O" type font (instead of the taller earlier "0"), is 3/32" thick, and has NO chain stop pin. I also have a Super Record 49t outer ring marked the same way, and also with NO pin. Seems the markings set these in the mid 1970s, and I'm pretty sure I've seen some earlier, tall "0" versions that already had the pin, so does this mean they are 3/32" Pista rings, or could they still be road rings from that late, still with no pin? Please correct me if I'm mistaken on any of the above givens. What are these rings intended for? Thanks...
Ciao,
Mark Agree
Southfield MI USA