Yup. Moveable type, like in the old days.
This was the early 70's, so there was no digital.
You would have a type holder (a chase) in your hand and grab type and spaces (ens and ems) as you construct words and sentences.
Then you would load that onto a press, ink up the platen aaaand start printing.
So that was like only 50 years ago, but that's how it was done.
Yep, I remember the type equipment. I saw it done when I was a kid, but never did it myself. A friends dad worked in a printing facility before he opened a dry cleaner business.
It is amazing the work that was required just to print things.