Description1910 aircraft intercom - Two tubes for duplex send and receive.jpg
English: Front page of Le Petit Journal in 21 August 1910. Showing French air-force ready to deter hostile advances, and equipped with intercom - two tubes for full duplex send and receive.
Date
Source
Le Petit Journal, defunct French Newspaper, 21 August 1910. Image 0ver 100 years old - Internet Gallica National Library of France
Author
Staff artist of Le Petit Journal, - over 100 years old.
Licensing
Public domainPublic domainfalsefalse
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