Experimental microphone telephone transmitter by Mr Campbell Swinton

Made:: 1885

maker:: Alan Archibald Campbell Swinton

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

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Experimental microphone telephone transmitter by Mr Campbell Swinton

Details

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