You can't use curly apostrophes unless you have special ones for both left and right.
So the memo could not have been made with a typewriter.
>>So the memo could not have been made with a typewriter.
It could not have been made with MY IBM Selectric using the ordinary Prestige Elite 12 pitch wheel. I don't have a left and right apostrophe, only straight. But maybe a fancier machine, although not in your ordinary Texas Air National Guard office? Maybe the guy was part time and worked full time in a law office or was a business executive?
I have calls in to my old boss, who taught me printing and collects typewriters and old typesetting machines, and my mother, who was a typesetter.
I think this is a question best answered by an expert, maybe someone at IBM, or someone with a specialty in document examination.
But I did read that one expert has already stated that the "4" has a closed top and no "foot" which is ONLY found in Times New Roman, and that Times New Roman is found ONLY on computers.