The same sort of paper cutter that was used in the teens is still in use in pretty much every print shop around. Some may have a few modern features, and more power, but the basic machine is the same.
The shop I worked at had a corner rounding machine that was actually from 1910. Foot powered. Grandad always told me to pay attention or I'd end up kicking a footpress, and eventually I did anyway. (Only for a day or two, and it was fun in a way
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Steve B