I think this information comes mostly from dealers bills of sale, particularly those who were accredited. Or the cameras could have markings.
There are some cameras that were engraved with the dealers name, sometimes at the factory. There are also some that were engraved with the recipients name but these were normally gifts from Leitz. I do not know if this was offered as a service to normal Joe public.
Apart from the bill of sale, another nice document that sometimes turns up is the bill for conversion or modernisation.
There are a number of lists that deal with serial numbers and batches on the net, I am sure we all have our favourites, but I am not aware of any publication of the more detailed information showing when and where they all went, what would in effect be their invoice ledger. It would surely be a mammoth task, there are an awful lot of cameras!
Michael