No sweat. If these documents were done on a typewriter, the typewriter was NOT a Slectric. If the documents were done on a typewriter, the typewriter was most likely an IBM "Executive" Model. There is a Selectric-Composer, but that is one weird cat, would not be found in an office, and came out, I think, after the date recited on the face of these documents.
Selectric - NOT proportional characters.
Executive - YES, proportional characters.
Got it.
I'd also add that the day that National Guard admin people get screaming top-of-the-line office equipment will be the day that the Devil gets to try out his ice skates.