‘signal’ historical pictures (exact matches)

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The Signal
The Signal
The Railway Junction
The Railway Junction
The Metropolitan Underground Railway
The Metropolitan Underground Railway
The life of a railway signalman, on duty in a London signal box
The life of a railway signalman, on duty in a London signal box
Modern Wonders, 1938: All Electric Signal Box
Modern Wonders, 1938: All Electric Signal Box
A Traffic Signal on a London street
A Traffic Signal on a London street
Early radio
Early radio
Signal Hill, California, showing a Gusher
Signal Hill, California, showing a Gusher