Well, not surprising, my dad had a typewriter° without "1". You had to type "l0" for "10".

Of course was the font chosen to be closer.

We still have this kind of ambiguities on our keyboards, like using a single quote for apostrophe (or vice versa)

°) after some searching, it must have been the iconic Olivetti Lettera 22 or one of the successors like Olivetti Lettera 32. I still remember the turquoise case with the black stripe in the middle.