Muirhead double coil direct writing recorder

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Muirhead double coil direct writing recorder, No
Science Museum Group
© The Board of Trustees of the Science Museum

Muirhead double coil direct writing recorder, No. 65215 (Patent No. 227793)

Details

Category:: Telecommunications

Object Number:: 1971-15

type:: recorder

credit:: P.Q. Cable Co.

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Muirhead double coil direct writing recorder

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