Polarised relay used on 2-button D.C. omnibus circuit

SMG00305583
Science Museum Group
© The Board of Trustees of the Science Museum

Polarised relay used on 2-button D.C. omnibus circuit, Newport station exchange

Details

Category:: Telecommunications

Object Number:: 1971-329

type:: polarised relay

credit:: British Railways, Western

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Polarised relay used on 2-button D.C. omnibus circuit

Details

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