Siemen's polarized double recorder, 1870

Made:: 1870

maker:: William Siemens

Siemen's polarized double recorder, 1870

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Siemen's polarized double recorder, 1870
Science Museum Group
© The Board of Trustees of the Science Museum

Siemen's polarized double recorder, 1870

Details

Category:: Telecommunications

Object Number:: 1876-1298

type:: double recorder

credit:: H.M. Postmaster General

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Siemen's polarized double recorder, 1870

Details

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