Back in my typesetting days I could mistakenly set a whole paragraph of type that was supposed to be Times Roman in a completely different font, such as Helvetica, and no one ... not even the proofreader ... would know the difference.
I think you're right about the font not being Times New Roman, or any type of Roman.
The Serifs on the sample look squared off, not tapered and curved like Roman.
I looked at the images of the memos, and tried to find a match using the Linotype font finder http://www.linotype.com/fontidentifier.html.
It didn't find a match, maybe because the image was not clear enough and a whole range of defining characters were missing.
I don't think the "forgery" was created using Word, unless the user had access to, and chose a very unusual typeface, and I doubt if it was created using a golf ball typewriter for the same reason, it would have to be a very unusual golfball.
Not to disagree but it's important to recall this was a photocopy and the .PDF is of the fax that CBS sent to the White House. At least that's what I've seen. There's a possibility we're just seeming the degeneration resulting from the photocopying, scanning, faxing and possibly rescanning processes. Those serifs are going to deteriorate terribly and depending on the algorithm settings for converting to B/W, it might well appear to be "squared off"--this is just a caveat.
Well take your expert talents and produce an exact match to any of the memos. There is $10,500 of reward money posted on this site, just waitng on YOU to collect it!
LLS
There's a marked difference between Times Roman and Helvetica. But, point taken.
The font is not as important as the justification, which just wouldn't have happened on an ordinary typewritten memo, typed by a man who had neither a type writer nor typing skills.
"I'll stand by my assertion (based on twenty years as a professional typesetter) that the type on the documents is not Times Roman, nor is it Palatino, as others have suggested."
I see by your profile that we share some common interests. I have a thirty year background in printing equipment sales and service. I repaired small offset presses and have seen the Composer in use, did you ever know anyone to use a Composer as an office typeWRITER as opposed to a typeSETTER which it was designed to be? I suppose a printer might occasionally have done so but I can't imagine a guard base having a typeSETTER instead of a typeWRITER.