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A2 Tower
Chicago, Illinois

A2 tower was built by the Milwaukee Road in 1938 and built to the Pennsylvania Railroad specifications. The tower houses a Union Switch and Signal Company Model 14 interlocking machine. The machine is a electro-pneumatic interlocking machine with 83 lever spaces though not all the levers remain today.



Union Switch & Signal Company Model 14, 83 Lever Electro-Pneumatic Interlocking Machine.


Union Switch & Signal Company Model 14, 83 Lever Electro-Pneumatic Interlocking Machine.