Originally Posted by coelcanth
the switch to hex socket bar clamp bolt was before 1975.. iab's link lists it as around 1972..
(and it lists 1/a's introduction as c. 1960-3 ?)
i have stems from 1973/74 with the 6mm hex
giro d'italia and campione del mondo have their own logo to replace crest on one side
also, earlier (pre-1978 ?) bars i have seem to use a different grooving on the ferrule than later models;
3 seperate sections rather than one wide grooved area
You're right! The classic rendezvous site lists the dates I posted above.
http://www.classicrendezvous.com/Ita...elli_parts.htm
Looks like we have a discrepancy, but since you have pre-75 stems with the allen bolt I am willing to go on that, plus it suits my purposes for restoration better.
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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