Test plug

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Test plug, single, for use with the National Telephone Co Ltd's
Science Museum Group
© The Board of Trustees of the Science Museum

Test plug, single, for use with the National Telephone Co Ltd's 'test jacks mounted on a wooden base', British, 1890-1900

Details

Category:: Telecommunications

Object Number:: 1915-252

type:: plug

credit:: General Post Office

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Test plug

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