Signal-staff posters & prints

The Lizard Serpentine Signal-Staff Quarry Near Cadgwith Cornwall 1854 Anonymous

U.S. Army Signal Corps Recruitment Poster Anonymous

Semaphore Signalling System, c.1794 Claude Chappe

Soldiers sending a semaphore signal using flags Anonymous

The Paris International Exhibition: Military Telegraphy and Signalling: Captain Colomb's Signal-Box for Working the Lime-Light France 1867 Anonymous

Signal Corps Recruitment Poster Jes Schlaikjer

Machinery of the Safety Signal Anonymous

Waiting for the signal English School

Signal Station. Pony Mt, 1863 September? Alfred R Waud

Visual Signalman, Trained Operator WA & AC Churchman

Sending a semaphore signal using flags, c1880 Geoffrey Douglas Giles

Union Telegraph Station Anonymous

The Signal Fire, 1880 William Hahn

Signalling for a Pilot Anonymous

New Street Signal Box People Will Always Need Plates

The Signal Fire, 1880 William Hahn

The Signal Anonymous

Coaling the Pacific mail SS 'Siberia', at the fortified naval station of Nagasaki, Japan Underwood & Underwood

Signal Telegraph Machine and operator, Fredericksburg, 1862 ca. December Alfred R Waud

The Naval Manoeuvres, with the Hostile Fleet: The Fleet Signalling with the Electric Search Light to the Colliers and Cruisers... Anonymous

Royal Navy Lieutenant and signal boy Anonymous

Heroic wireless operators, 1912 Unknown

Visual Signalman, (3rd Class) WA & AC Churchman

Soldiers Receiving Signal at Signal Tower Anonymous

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

Signal tower on the line before Petersburg, Va, 1864, USA Anonymous

A Hitch Charles Samuel Keene

Preparing to Make Signals Anonymous

Edinburgh: Signal Tower Leith Harbour 1829 Anonymous

The Particular Service Squadron in Bantry Bay: Firing Mines from the Land. B Signal Box Anonymous

1950s Football Referee Making Hand Signal Time Out Blowing Whistle Anonymous

Guglielmo Marconi, Italian pioneer of wireless telegraphy, Signal Hall, Newfoundland Anonymous

The Signal Tower, Brittany, 1911 Maxime Emile Louis Maufra

Tunnel Signal, 'All Right' Anonymous

Interior of the A.B. Signal-Box of the South Eastern Railway at the London Bridge Station, London, 1866 Anonymous

Yeoman of Signals WA & AC Churchman