What I am suggesting is that they have scanned their paper records into image files and those image files are stored in a database. When they need to produce an official document, they assemble it from previously archived electronic images.
I would be somewhat surprised if the actual paper copy that was created in 1961 even exists today, only it's digital image remains. I don't know that for certain, but that is often how old records are archived.
That would be standard for going paperless, yes. I think that's quite possible, depending on the IT for the office.
When they need to produce an official document, they assemble it from previously archived electronic images.
I think I'm with you, if this is a single document, scanned, given a unique ID and stored on an image server. No need to assemble in this case, just provide a pdf or print of the file. The date on this is April 25, so perhaps the whole thing was done electronically - the pdf sent posted on the gov website.