Compare one of the Jerry Killian memos given to CBS News,
and allegedly produced in 1972, to the same text created using MS Word 2002. A person who wishes to remain anonymous forwarded a link to me for an animated presentation which overlaps the two documents and shows, using a current font, how tab spacing and inter-line spacing match the defaults in Microsoft's Word.
You'll need to have Macromedia Flash installed to watch the slide show. Check it out at:
http://img41.exs.cx/my.php?loc=img41&image=60minbusted.swf
The headings up top, with the addresses. No circa 1972 typewriter could center proportional fonts.
(Which is my suggestion for an addition to that presentation, obviously) :-)