Switch signal posters & prints

Switch yards, Union Station, Washington, D.C., c.1907-10 Detroit Publishing Co.

On Early Shift Railroad Advertisement Poster Terence Tenison Cuneo

Foucault's Switch Anonymous

Sending a semaphore signal using flags, c1880 Geoffrey Douglas Giles

Tunnel Signal, 'All Right' Anonymous

Cabinet of a light switch Anonymous

The Signal Anonymous

Preparing to Make Signals Anonymous

Red Cycle and Pedestrian Signal Anonymous

Traffic Signal and Control Anonymous

Signalling by semaphore on board HMS Camperdown Gregory & Co

Switch on a railroad track Anonymous

Flags used for Nelson's famous signal at the Battle of Trafalgar Anonymous

Railway Signal Anonymous

Semaphore signals Anonymous

Railway Apparatus at the Paris Electrical Exhibition: Fig. Anonymous

Sketches at the Autumn Manoeuvres: Party Practising for Signalling from Outpost to Field Telegraph Anonymous

The Signal John William Godward

The Signal, c.1860 James Webb

Claude Chappe demonstrating his optical telegraph (semaphore) system in 1793 (c1870) Unknown

Sectional view of a telegraph tower for Claude Chappe's semaphore, 1792, (c1870) Unknown

Her Signal, c.1892 Norman Garstin

The Volunteer Review At Brighton, UK Anonymous

Bottlenose dolphin interacts with Trainer. Anonymous

1960s 1970s Office Woman Operator Working At Pbx Telephone Switchboard Anonymous

The Signal Fire, 1880 William Hahn

Signalling for a Pilot Anonymous

Signalling Question And Answer, Military Manoeuvres In Bermuda 1873 Anonymous

General W. B. Hazen, New Chief Signal Officer Anonymous

1930s Woman Telephone Operator Sitting At Large Manual Switchboard Directing Calls Anonymous

1960s Alarmed Woman Holding Up Her Hand To Stop Something Anonymous

Indian Telegraph, 1860 John Mix Stanley

Voting Booths with Switches Anonymous

At the Brighton Theatre of War: Signalling 1880 Anonymous

Claude Chappe (1763-1805), French engineer and inventor, c1901 Unknown

Platelayer Signalling that the Track is Clear Anonymous