One of the oldest examples of a pneumatic signal box was Petersham. Although little used for many years it was opened for emergency working and sidings, there was also a frame B. The diagram shows its age. (1988)
[Copyright: Graeme Skeet]
One of the oldest examples of a pneumatic signal box was Petersham. Although little used for many years it was opened for emergency working and sidings, there was also a frame B. The diagram shows its age.
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