Howdy all,

I am researching steel Cinelli stems from the 50s and 60s, and I keep seeing references to model numbers. (mod 1, 5, etc).

Where can I find these model distinctions? Are the only differences angles? I gather there were at least 3 with road being 73° and track being two steeper variations. I’ve googled a bit and searched on here to no avail.

thanks.