I need help. It's hard to find older 70's style examples of how people controlled their trains. Since the appearance of DCC a lot of the control systems are more geared toward computer sreens and hand held interfaces. I really want to see things that look more like what a real railroad would have used in the 50's to 70's. I am curious about control panels that look like CTC panels. or, train detection using older tech like relays and such. Pictures greatly appreciated.