The image, titled "SCR Apparatus," features a close-up view of a trench end with a portable spark transmitting set known as SCR-74. This equipment was used during World War One for military communication purposes. The photograph was taken by photographer Reet on March 5, 1910. This image is not intended for publication and is part of laboratory notes from March 5, 1918.

---

Size: 7982px × 6302px
Photo credit: © piemags/NSC / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 20th-century, 2627, 5-1910, activities, american, ap, apparatus, army, artifacts, communication, communications, corps, devices, early, equipment, gear, historic, historical, history, innovation, march, memorabilia, military, operations, photographs, photography, portable, radio, reet, scr, scr-74, set, signal, soldiers, spark, technology, transmission, transmissions, transmitter, transmitting, trench, trenches, view, war, war-time, warfare, wireless, world, ww1