I mentioned that about the TH also, but that is simple solved by pasting it in after the fact.
The document was copied to hell and back several times and would cover up the paste if that was what happened.
All old typewriters are in existence, they are maintained in various museums and in particular the museums of the companies that built them, so this will be all proven one way or the other for sure.
I lean to fraud myself.
I could duplicate the exact page with an older program I used called Designer 4.0 which is a computer graphics program for setting up press stuff or business materials.