Card #46:
Air Mail & the Army Signal Corps

Date created: January 1, 1970
Date mailed: January 1, 1970
Received? yes

COVID Card 46

Image Description

Cube-shaped buildings on the right represent “wig wag” (aerial telegraphy). From the top cube, a path runs through a heliograph component and passes by a weather balloon on it’s way to a vacuum tube-shaped building. Switchboard wires decorate the ground.


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