[Cboldt]

Most correpsondence in the 1970s was prepared using IBM Selectrics (not the model you have shown) outfitted with either a 10 pitch Pica ball or a 12 pitch Elite ball. These documents might have been prepared using a 12 pitch Elite ball, but the type seems too proportional and large to me.

The Selectric doesn't do porportional spacing. There is a "Selectric-Composer" that does, but it is not likely to be used in a regular office.

There were NO superscript characters on a Selectric ball. You simply typed the lower-case letters following the number.

I don't disagree with that. The general conclusion that some are jumping to is that teh proportional spacing and "superscript st" are CONCLUSIVE proof that the document could not have been prepared on a typewriter in the early 1970's. I think other evidence is required.

[JCEccles]

The Selectric doesn't do porportional spacing. There is a "Selectric-Composer" that does, but it is not likely to be used in a regular office.

Exactly. Squadron pogues didn't have anything fancy. The little orange-case Selectric with the 12 pitch elite ball was it.

Because of my background and knowledge of standard adminstrative formatting, abbreviation, and filing practices relating to official correspondence in the 70s I could have made perfect forgeries. These are not perfect by any means.