‘signals’ historical pictures (exact matches)

Submarine telegraphy
Submarine telegraphy
Settler in America
Settler in America
A Traffic Signal on a London street
A Traffic Signal on a London street
London and North Eastern Railway Flying Scotsman train leaving Kings Cross Station, London
London and North Eastern Railway Flying Scotsman train leaving Kings Cross Station, London
The Age of the Train
The Age of the Train
Baudot's printing telegraph
Baudot's printing telegraph
Gregory Grasshopper
Gregory Grasshopper
Claude Chappe's telegraph
Claude Chappe's telegraph