The signal on the left is from Chicago and is a subway signal, I got this from IRM. The signal in the center is a Dwarf Semaphore that was used in Grand Central terminal in new York. This type was only used at that location. It takes 110VDC to operate. The signal on the right is the train order signal from WANN interlocking from Woodriver Illinois. The big grey cabinet runs all the signals, inside of lots of relay contactors, a PLC, and a lighting transformer.