In the early 90’s I used to work at that Westinghouse plant (was GEC by then) and there was a fantastic picture of rows upon rows of buses to transport the workers.
The other thing that stuck me is how smart the men leaving were. Looked like a couple of thousand and the majority were in overcoats and/or bowler hats.
Edit - just remembered this as well. In one of the corridors there was a series of panels on the wall for long service awards. They went up in 10 year increments. There was one guy who had worked there for 50 years!