jrozwado: Tucson, AZ - Fort Lowell Park - Fort Lowell Museum - Heliograph
The National Guard: Idaho National Guard
The National Guard: Idaho National Guard
cptosman71: 701-4A-6218. Setting Up Heliograph - Fort Verde State Historical Park - Camp Verde, AZ (10-06-19)
Peter A Levey: Heliograph Team
Preston Digital Archive: T. Beech & Sons (glass works). 25, North Road, Preston.
Eli Dark: USS Alabama BB-8 1901
Archives Branch, USMC History Division: Signal Training, ca. 1918
Vasnic64: Collector - L'équipe de photographie de l'armée et leurs matériels en manoeuvre - France - 1910/13
olerubberboots: Lindh och Häggbom signalerar 1910-11
Aussie~mobs: 4th Anzac Camel Battalion Signals - Egypt - WW1
Auchmuty Library, UON: Australian Imperial Expeditionary Forces, Newcastle, NSW, Australia, September 1916.
Υπουργείο Εξωτερικών: Φωτογραφική έκθεση υπηρεσίας Διπλωματικού και Ιστορικού Αρχείου. Photo exhibition of the Diplomatic and Historical Archive Department
G-D-F: GDF_8612
The Shaldives: L'ancien sémaphore de Kerhoazoc
The British Library: An Indian Cavy. Brigade signal troop at work in France [Aire]. Photographer: H. D. Girdwood.
massey_aero: Survival equipment - One man raft
riv44: international-morse-code
kleinmatic: Great Outdoor Signal & Code Dial
rodriguezn6459: Heliographing from Pehtud to Marahui.
thulobaba: helio tripod markings
asarstudios: Children aboard HMS Hood at Vancouver. Signalers demonstrate their jobs. 25 June 1924, by Stuart Thomson colorized by Ahmet Asar
sybarite48: Baccon (Loiret)
Ici Bretagne: telegraphe-chappe
josseline.balmain: 20190816_110405
ITU Pictures: 1792-00
Mairie de Carvin: LE TELEGRAPHE DE CHAPPE
fasaig: Le Télégraphe Chappe, Marcy
Mairie de Carvin: LE TELEGRAPHE DE CHAPPE
Trainiac: DM025