HistoryPornEnglish • 11 months ago

Two Imperial German sound locators for detecting airplanes, WW1, 1917

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Two Imperial German sound locators for detecting airplanes, WW1, 1917

HistoryPornEnglish • 11 months ago

Chat

@[email protected]
link
fedilink
English
9•
edit-2
10 months ago
Removed by mod
- Cethin
  link
  fedilink
  English
  9•11 months ago
  I assume magnification to spot planes. Basically binoculars without the need to hold them.

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