.....and what else, dazzlenation?...well, 'this one' is rather 'deja vu'....on the timer system....go figure:

https://www.youtube.com/watch?v=jFkRZe3ZJOw

still not entirely sure if that is what you are fishing for but anyway....lol:

https://www.youtube.com/watch?v=lC3Dyyiq08k

https://en.wikipedia.org/wiki/Kingsway_telephone_exchange

https://mary2point5.tumblr.com/