Signal Corps conducting buzzer tests during World War I. The photograph, taken in 1919, shows soldiers working on radio communication equipment. It is labeled as test number 754 with the symbol "AU." This was a part of routine signal Corps testing and communication exercises.

---

Size: 9182px × 6304px
Photo credit: © piemags/NSC / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 1, 754, 1919, activities, american, apparatus, archive, armed, army, artifacts, au, buzzer, buzzing, code, communication, corps, description, devices, documentation, equipment, exchange, forces, historical, history, information, intelligence, memorabilia, military, morse, notes, number, operations, operators, photographer, photographic, photographs, photography, radio, rdd, received, record, signal, signals, soldiers, symbol, technology, telecommunication, test, testing, tests, training, transmission, war, wartime, world