Ader magneto-type hand telephone National Museum of American History

Telephone - Wikipedia

First telephone exchange hi-res stock photography and images - Alamy

Civil War Artifact Over Time: Davis & Kidder's Magneto-Electric Machine - National Museum of Civil War Medicine

Telephones Across the Smithsonian, Page 3

Telephones Across the Smithsonian

Hand-held magneto telephone National Museum of American History

Bell hand-held magneto telephone National Museum of American History

Telephones Across the Smithsonian

Telephones Across the Smithsonian

OMNIA - Magneto