I had one in my shop for repair the week this story broke, and it had neither proportional spacing or sup script.
LOL!!
Funny about this "story", was that I tried to get as close to the original "fake but accurate" document with a 70s. model typewriter and there was no way that document even fit onto the same page.
I tried every different IBM ball (now that tells my age) and not one came even close to the "fake but accurate" See BS had on that edition of 60 minutes of shame and FR fame.