Air raid warning device, World War I, 1918. Copy of two photographs showing a sound detector. During the First World War acoustic detection devices were used to warn of enemy aircraft. The photographs were taken for the Ministry of Munitions.

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Details

Creative#:

TOP20801881

Source:

達志影像

Authorization Type:

RM

Release Information:

須由TPG 完整授權

Model Release:

No

Property Release:

No

Right to Privacy:

No

Same folder images:

Same folder images