Justification would mean that the right side lined up, just as the left side lines up. They don't.
Justification would be a complete dead giveaway. The problems are more subtle.
1. Proportional spaced fonts were rare in 1972.
2. Superscripted "th" very rare.
3. I don't recall ever seeing a curly apostrophe from a typewriter.
4. The baselines of the letters line up very smoothly.
I don't recall ever seeing a curly apostrophe from a typewriter.
I think the Selectric balls had different symbols that you could choose. Mine used to have a curly apostrophe because I hated the straight single quote.
I was gone for a little bit so excuse me if this has been solved.I ran down to the registrar of deeds office and looked up files from '72. I found examples of a clearly more modern looking type, very similar to the memo. the apostrophe's all were straight. I couldn't however find a secretary that used the raised "th". I don't know if that helps much but it seems closer.