5-needle train signalling instrument used on the London and Blackwall Railway, probably made by W T Henley's Telegraph Works Company for the Electric Telegraph Company, England, 1840. The London and Blackwall railway was the second permanent telegraph line to be constructed, along a 3 mile section of the track.
- Signalling & Telecommunications
- component - object
- Donated by H.M. Postmaster General
- Permanent collection
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