A company I used to work for had a small piece like this displayed in the lobby. I'd been hoping to find some still in operation someplace. A project I'm involved in now has this one in place, but wants to keep it for their own display after the entire building is rewired. RATS, I wanted it.
I'll keep you in mind when I upgrade Goodyear in Lincoln. They have a 2300V and 480V combined control board. If my outfit gets the contract, I'll have to dismantle it. It's the original Westinghouse.
Many moons ago Northern States Power hauled all of the slate panels from the St. Anthony Falls Dam powerhouse to the dump and tortured me for weeks before telling me the truth. It was a treasure trove of pre-1920 Electrical Control technology.
The stuff is still out there, I see it every now and again.