Worth mentioning Victor Kapitanov won 1960 Rome Olympics on a Model B. In the 60s and 70s I saw a few Soviet team Cinellis, they were invariably so beat up they made the as found condition of the subject of this post look really good. And they had seriously mixed parts groups. Didn't stop them from pulverizing the locals.

A non-Cinelli story about dating by parts. My wife and I recently bought a '67 Falcon (special build, no factory bike) with absolutely total provenance. Purchased from original owner, who we knew back when she purchased the bike. We knew the importers and still know them. We knew about about the project to go visit London town and buy bikes even before Falcon did. Reacquainting ourselves with the bike we found a a Campy front derailleur with the lower cable stop, dated that to 1962. The Ambrosio stem and handlebar were dated less reliably but seemed late '50s. No way would we have dated the bike as 1967 by looking at the parts. But it was most definitely 1967. If you have a Schwinn or a Raleigh and a file of old catalogs you can get somewhere by looking at parts. With bikes built one at a time it is different.

Another personal story from the bike shop, 1973, talking to Cinelli. I asked about the bivalent hubs. No, none were immediately available. But they did have all the parts and could assemble some if we wanted. I offered to take five pair. No, it would not be reasonable to go through all the old boxes for just five. Would we be able to take 100 sets? Had I been able to say yes the timeline for bivalent hubs would be completely different. Bikes were a small business.