>>gjvc+(OP)
The Connections Museum in Seattle has one of these in operation (as well as other generations of mechanical and electronic switching) which is amazing to see and hear in person.
Here's the No. 5 Crossbar: https://www.youtube.com/watch?v=XKyXCZV_faY
The whole museum is absolutely worth repeated visits.
https://www.telcomhistory.org/connections-museum-seattle/
https://www.youtube.com/@ConnectionsMuseum