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Air defense guards listening for approaching planes using an acoustic amplifier / sound collector. "Guarding Our Coasts Against Night Bombers," and "Tanks Can Be Destroyed."
Source: Horton Family, Noblesville, Indiana
Restoration by: magscanner
- Created on
- Saturday 29 October 2011
- Posted on
- Saturday 29 October 2011
- Visits
- 1334