Category:Electrical instruments and telephones of the U.S. Signal corps (1911)

Media in category "Electrical instruments and telephones of the U.S. Signal corps (1911)"

The following 102 files are in this category, out of 102 total.

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  Electrical instruments and telephones of the U.S. Signal corps (1911) (14569823310).jpg 1,716 × 2,322; 367 KB
  
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  Electrical instruments and telephones of the U.S. Signal corps (1911) (14569828020).jpg 1,858 × 1,918; 419 KB
  
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  Electrical instruments and telephones of the U.S. Signal corps (1911) (14754214864).jpg 2,898 × 1,744; 1.05 MB
  
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  Electrical instruments and telephones of the U.S. Signal corps (IA electricalinstru00unitrich).pdf 845 × 1,341, 344 pages; 22.6 MB