There were a bunch of cheap typewriters that worked this way, collectively called index typewriters. Here's an example, the simplex: https://site.xavier.edu/po

There were a bunch of cheap typewriters that worked this way, collectively called index typewriters. Here's an example, the simplex: https://site.xavier.edu/polt/typewriters/simplex.html https://site.xavier.edu/polt/typewriters/simplex.html