What I find interesting, and it's probably only me, from 1947-1979, Cino Cinelli pretty much stuck to a 4-digit numeric serial system. Yes, there are exceptions, but that puts total production of 10k frames for 32 years, a little over 300/year. I haven't seen a duplicate number, yet
.
Something is odd with the math. Or, with me.
From observation, the bikes were available, but not in terrific quantities at least in the USA.
Spence Wolf was probably a very notable dealer/importer at least on the West coast.
He kept a flow arriving and good records. Someone has those records, but I recall about 45-60 per year on average once things got going?
There were clusters of near sequential numbers, maybe a way to help keep track on the shop floor if nothing more.