Damn brother I remember when the steel mill housing that formed steel into rod and I beams were controlled by a series of IBM cards with a series of punches.
Wife back in the day actually operated a switch board.
Back when there were call boxes on the corners.
Penetrating oil spray did it for me a brass shavings had it froze up. I got small pieces of wood put the bolt looking up. Took pin out,used a pin working it pushing down. It freeed up.