Very cool work photo. I always think of print shops as enormous - perhaps from family descriptions, but this is a tiny one. I wonder if it's a part of a small town newspaper.
Interesting about the upper/lower case terminology.
We have a lot of printers in my family tree, all working in London. My uncle, his father, my grandfather's uncle and other great uncles.
Printers - and blacksmiths! We have a lot of those too.

It amazes me how adept those typesetters were, and doing it all upside down. And that typesetter on the right needs a wider platform to stand on. Yikes!