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- Cross Section of Carbon Button Telephone Transmitter, 1878 -
- 1878
- Collections - Artifact
Cross Section of Carbon Button Telephone Transmitter, 1878
- Telephone Transmitter Component, 1880-1920 -
- 1880-1920
- Collections - Artifact
Telephone Transmitter Component, 1880-1920
- Telephone Transmitter, 1870-1900 -
- 1870-1900
- Collections - Artifact
Telephone Transmitter, 1870-1900
- Telephone Transmitter Component, 1880-1920 -
- 1880-1920
- Collections - Artifact
Telephone Transmitter Component, 1880-1920
- Telephone Transmitter and Diaphragm, 1880-1900 -
- 1880-1900
- Collections - Artifact
Telephone Transmitter and Diaphragm, 1880-1900
- Telephone Transmitter Housing, 1880-1920 -
- 1880-1920
- Collections - Artifact
Telephone Transmitter Housing, 1880-1920
- Telephone Transmitter Component, 1880-1920 -
- 1880-1920
- Collections - Artifact
Telephone Transmitter Component, 1880-1920
- Telephone Transmitter Component, 1880-1920 -
- 1880-1920
- Collections - Artifact
Telephone Transmitter Component, 1880-1920
- Telephone Transmitter and Diaphragm, 1886-1890 -
- 1886-1890
- Collections - Artifact
Telephone Transmitter and Diaphragm, 1886-1890
- Telephone Transmitter Component, 1900-1950 -
- 1900-1950
- Collections - Artifact
Telephone Transmitter Component, 1900-1950