This simply isn't true. Proportional is different from justified. The documents are not justified.
And the "th" is a non-issue.
How is it a non-issue? From what I've read on this thread, it seems to have been impossible to do back then on any commonly available typewriter (or, for that matter, almost ANY typewriter at all...). Hence, it is prima facie proof of a forgery. What am I missing?