Correct. The IBM Executive required a trained clerk to type the memo TWICE to get the proportional font...hardly something that a Lt. Col. is going to do on his own (there are no clerk's initials on the bottom of the memos) for a memo so informal that it didn't even merit TANG letterhead or a CC list.
Moreover, I have yet to see an IBM font from that era that had the small sized superscript "th" character(s). Some clerks knew to roll the page half a line down to get the "th" above the 111 or 147, but getting the "th" to be a small "th" is a different thing entirely with technology from that era.
2 Full Legislative Days Left Until The AWB Expires