Signal Corps apparatus MER 1562 in use during World War One. The photograph shows the equipment and its corresponding symbol, as well as a note indicating the product description and the fact that it was taken by the RDCD.

---

Size: 9178px × 6297px
Photo credit: © piemags/NSC / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 1562, activities, american, appar, apparatus, army, code, communication, corps, description, device, electronic, equipment, gear, historical, innovation, instrument, instrumentality, machine, machinery, mer, military, morse, operations, photographer, photographs, photography, rdcd, receiver, signal, signalman, strategy, symbol, system, technology, telecommunication, telegraph, teletype, tools, tower, transmitter, war, wartime, world