I see the keyboards. I have one of those that is attached directly to a mechanical printer. No electricity or computer. The pressure of the fingers pushing or striking the key is transmitted via a mechanical linkage to the proper key in a radial array of what appear to be printer’s letters attached to swing arms.
The system is cleverly inked by a cloth tape that has been covered in ink, and which is also moved slightly each time the fingers strike a key. A large roller, and some smaller rollers hold a sheet of paper - pretty much one at a time - no automatic feeder in place. It is possible to actually print using this system. An ergonomic lever moves the roller back and forth to create new lines, and a gear mechanism moves it each keystroke to simulate letter spacing.
It was made in the 1930s by a company named “Royal”. This is not the exact model, but it’s close.