Telegraph Block Instrument
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LicenseThis image is released under a CC BY-NC-SA 4.0 Licence
Buy this image as a print
BuyLicense this image for commercial use at Science and Society Picture Library
LicenseThis image is released under a CC BY-NC-SA 4.0 Licence
Buy this image as a print
BuyLicense this image for commercial use at Science and Society Picture Library
LicenseThis image is released under a CC BY-NC-SA 4.0 Licence
Buy this image as a print
BuyLicense this image for commercial use at Science and Society Picture Library
LicenseThis image is released under a CC BY-NC-SA 4.0 Licence
Buy this image as a print
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LicenseTelegraph block instrument; South Eastern Railway
Science Museum Group
© The Board of Trustees of the Science Museum
Telegraph block instrument; South Eastern Railway
Science Museum Group
© The Board of Trustees of the Science Museum
Telegraph block instrument; South Eastern Railway
Science Museum Group
© The Board of Trustees of the Science Museum
Telegraph block instrument; South Eastern Railway
Science Museum Group
© The Board of Trustees of the Science Museum
Telegraph block instrument; South Eastern Railway
Science Museum Group
© The Board of Trustees of the Science Museum
Telegraph block instrument; South Eastern Railway. Walker's patent. Commutator-box with bell-key/plunger, state-of-line disc-indicator (for "Up Line"), and trigger. To accompany a Walker's Lock and Block double semaphore-arm instrument.
