Mrs. NavySEAL reminded me of one important thing about the IBM executive. The letters would continually become out of alignment due to the fragile nature of the key arms. Only a technician could correct the seeming floating letters.
I'm most interested in the way the number 4 is done on this machine. Do you know what typefaces were available for this machine?
The purportions of the different letters are not the same. Your example, the five "wwwww" looks about the same length as four "mmmm". A typewriter would have to have some regulularity, while a computer need not. So this makes sense.
In my test, the "wwwww" is just slightly narrower than the "mmmmm". Completly different than your image.
If your example is correct, I still think the font is hugely different. Which would entirely preclude making a duplicate unless every letter was adjusted to match MS Word.