A photograph of an oscillation transformer, model SCR-75-A, used by the Signal Corps during World War I. The image is numbered 36408 and was taken by a photographer from the Signal Corps. The notes mentioned another oscillation transformer, model SCR-73-A, with serial number 36408 as well.

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Size: 8581px × 5655px
Photo credit: © piemags/NSC / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: ..., 1-1000, 10, 111-sc, 111-sc-36408, 1921, 36408, 73-, activities, american, army, au, corps, ecd, issued, march, military, notes, number, oscillation, photographer, photographs, scr-75-, signal, states, symbol, transformer, united, war, world