Radio key used by the Signal Corps during World War I. This particular key is the flame-proof SUMBER 55,564. It was commonly issued and used for sending and receiving radio signals. It is recognized by the distinctive SIGNAL CORPS PHOTOGRAPHER RECO symbol and is listed under the designation NOTES TIN 53564.

---

Size: 8547px × 5771px
Photo credit: © piemags/NSC / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 55, 564, activities, american, apparatus, collection, communication, corps, description, devices, equipment, flame, historic, history, images, issued, key, military, operations, photograph, photographer, photographs, proof, radio, reco, signal, signaling, soldiers, sumber, symbol, technology, telegraphy, tin, vintage, war, world, wwi