Helicopter - French engineer Oehmichen at Valentignay, Doubs
Throughout the world, inventors seek to build a viable helicopter : here French engineer Oehmichen flies his graceful project at Valentignay, Doubs
Picture No
10116753
Media ID
47310103
Size
5553px x 3260px
(2.1MB)
Credit
Mary Evans Picture Library
Source
Unnamed photographer in L'Illustration' 12 May 1923 page 493
Date
28 April 1923
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