Telegraph block instrument, Great Eastern Railway
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LicenseThis image is released under a CC BY-NC-SA 4.0
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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
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
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Buy this image as a print
BuyLicense this image for commercial use at Science and Society Picture Library
LicenseTelegraph block instrument; GER
Science Museum Group
© The Board of Trustees of the Science Museum
Telegraph block instrument; GER
Science Museum Group
© The Board of Trustees of the Science Museum
Telegraph block instrument; GER
Science Museum Group
© The Board of Trustees of the Science Museum
Telegraph block instrument; GER
Science Museum Group
© The Board of Trustees of the Science Museum
Telegraph block instrument; GER
Science Museum Group
© The Board of Trustees of the Science Museum
Telegraph block instrument; GER
Science Museum Group
© The Board of Trustees of the Science Museum
Telegraph block instrument; GER
Science Museum Group
© The Board of Trustees of the Science Museum
Telegraph block instrument; GER. Pegging/non-pegging 2-needle 2-position/2-indication absolute, with a vertically-mounted large brass flap (painted black on one side and green on the other). A small brass red "Train on Line" reminder-flap is also attached, covering either one red brass plunger (LHS) or one brass white plunger (RHS).
