Telegraph block instrument (sending)
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LicenseThis image is released under a CC BY-NC-SA 4.0
Licence
License this image for commercial use at Science and Society Picture Library
LicenseThis image is released under a CC BY-NC-SA 4.0
Licence
License this image for commercial use at Science and Society Picture Library
LicenseThis image is released under a CC BY-NC-SA 4.0
Licence
License this image for commercial use at Science and Society Picture Library
License
Science Museum Group
© The Board of Trustees of the Science Museum
Telegraph block instrument (sending)
Science Museum Group
© The Board of Trustees of the Science Museum
Telegraph block instrument (sending)
Science Museum Group
© The Board of Trustees of the Science Museum
Telegraph block instrument (sending)
Science Museum Group
© The Board of Trustees of the Science Museum
Telegraph block instrument (sending)
Science Museum Group
© The Board of Trustees of the Science Museum
Telegraph block instrument; Great Northern Railway/London and North Eastern Railway (GNR/LNER) (modified). Pegging absolute 1-needle (GCR with plastic needle-stops) 3-position/3-indication. With wood-handle and catch-handle/spike commutator, above which is an ivorine plate inscribed "Sunday Only". LNER Back-Box attached; padlocked/no key.