1975 Safety meetings... Or more like 1954, gotta love the painters attire, or wonder if this was a staged picture.
But really, fun link to a coke advertisement that doubles as a "how the hell did they do that without computers" article for signs:
https://www.coca-cola.co.uk/immersive-gallery-folder/the-piccadilly-sign
1975 I was the last thing my old man was thinking about, he graduated HS in '73... He went to school and worked part time for my grandpa. Been running since 1920, so its always been signs for my family.
Somewhere I have a machine that you can trace over a master tile to mark out a letter shape, dials and such for sizes. Anybody recall what those were called?