Signal Corps apparatus for airplane antenna reel (French type) radio apparatus in use during World War I. The photograph was taken in 1919 by an unknown photographer. The image shows a prototype

WWII_Radio_Direction_Finders

This photograph shows a Signal Corps apparatus used during World War One. It is an Airplane Aerial Radio Reel of French type, known as WUNDER 2217. The photograph was taken by the

Aerial signal corps equipment hi-res stock photography and images - Alamy

United States Signal Corps photographic collection, 1918-1919 - University of Michigan William L. Clements Library - University of Michigan Finding Aids

Signal Corps radio apparatus used during World War One. This photograph was taken in 1919 by a photographer named ADD. The apparatus is labeled as NUNGER 2221. The image is part of

AMERICAN MILITARY TELEGRAPH KEYS - TELEGRAPH & SCI INSTRUMENT MUSEUMS

Antenna telecommunication apparatus hi-res stock photography and images - Alamy

Shooting World War I: The History of the Army Signal Corps Cameramen, 1917-1918 – The Unwritten Record

Airplane apparatus hi-res stock photography and images - Page 3 - Alamy

Getting the Message Through-Chapter 4