Experimental microphone telephone transmitter by Mr Campbell Swinton
- Made:
- 1885
Experimental microphone telephone transmitter by Mr Campbell Swinton (1885) (two india rubber bands unfastened)
Details
- Category:
- Telecommunications
- Object Number:
- 1916-50
- type:
- telephones
- credit:
- Swinton, Mr. A.A. Cambell