[fso301]

Only if you had the original documents. These look like 10th generation copies which itself is odd for a memo for a personal memo file.

I'm wondering if at the time, a carbon copy was more likely than a Xerox?

[Paleo Conservative]

I'm wondering if at the time, a carbon copy was more likely than a Xerox?

Not in my dad's office. In fact once a docucument was typed and corrected, the Xerox copy was used as an original, because it looked better than the typewritten document (no marks left from overstriking with the correction ribbon and typing the correction).