Telegraph operator using a Hebern electric code machine. Photographed at the Western Union Telegram Office, Washington, D.C., USA in March 1923. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Library of Congress |
Bildgröße: | 6690 px × 5230 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |