Telephone apparatus available to New York subscribers. This used an Edison transmitter and a 'pony crown' receiver (lower right of picture. Wood engraving c1891 | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / UIG / Universal History Archive |
Bildgröße: | 5772 px × 6056 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |