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'Forsyth's Improved Railway Signals'.

'Forsyth's Improved Railway Signals'.
3 1 c m
actual image size: 32cm x 23cm


Coloured lithograph showing use, together with a diagram giving the comparative value of coloured lights for signalling. Printed by Bradshaw and Blacklock.

Image Details

Image Ref.

© NRM / Pictorial Collection / Science & Society Picture Library

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