There wouldn’t have been control numbers printed on the forms sent out to various hospitals.
Of course not that's what I said, OR let nurses add the the control numbers to the forms.
And as far as multiple nurses being registrars at different hospitals, that is absolutely a likely scenario. It’s the same for titling cars, each dealership has a title clerk who is a notary authorized by the state (at least here in Texas).
You are the one who never gets it. You would not let the control numbers be applied to the BCs until they were ready to be filed into the records, especially not in a manual system of 1961.
I never said that nurses were adding control numbers. You’re just making up stuff.