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I can only speak for my own experience, but the manual typewriters we used in middle school in the mid 1970s, and the electric typewriters we used in high school a couple years later were all Courier. These were all used typewriters donated by businesses. So I learned to type on machines that were in common use from the early 1970s to the mid 1970s. You could switch between 10 cpi (characters per inch) also known as pica, and 12 cpi also known as elite. In later years we could use an even smaller font, 15 cpi. It took me a long time to get used to the computer font sizes, which get larger as the number gets larger. With typewriters, the larger the number the smaller the font.

What could cause the 2nd "M" in "MEMORANDUM" to become distorted? It couldn't happen while typing it, because that part on the typewriter is a solid object. Even if it did become bent, all following "M"s would be bent. It can't happen just by copying it. It could happen if you were using a computer graphics program to rotate the text just enough to make it look like the paper had been put into the typewriter crooked, as often was done. As you rotate the text, the pixels become skewed. It's usually not noticable, but if you don't get the right angle the first time, and you go back and forth with it, it becomes pronounced, as it is here. In at least one of the documents, part of the text is rotated and part of it isn't. In others, different parts of the text are rotated to different degrees. This could happen if you put the put the paper in and typed part of it, took it out and put it back in to type more. Or it could happen if you used a computer graphics program to rotate the text, and did it one section at a time. Since this is typed perfectly with no mistakes or corrections, I'm guessing it was typed by a perfectionist. He would not have left the paper crooked. Getting it straight is a simple thing compared to typing it out with no errors.

The acronym "NLT" is common in the military. Would anyone ever type out "not later than (NLT)?" I don't know, but I doubt it. All of my husband's papers that I've looked at are full of acronyms with no translation of what they mean. It's always a source of laughter for us when I try to read them, and make up meanings for the acronyms. None of his papers are meant to be read by civilians. All of the papers I've seen here are written for civilians.