FACTUM . . . .
Do duly note that you just might have an old time military person that learned his typing on a . . . .now you will LOVE this ! KLEINSCHMIDT teletype and they absolutely have NO lower case letters on them.
As is also being true, of the Teletype Corps TT-4s and TT-76s . . . . not to even mention the world SPEED demon
Crypto processors and their flying drum printers.
A lack of that hindrance and some machines perforating tape, INSTEAD of activating swinging type hammers, will often have typing speeds of in excess of 100 wpms being ripped off.