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Title: Telegraph Block Instrument, North Eastern Railway, 3 positio [Go to resource]
Description: Telegraph Block Instrument, North Eastern Railway, 3 position, pegging type, sending, ex Redmarshall Station. License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: block instrument Source: Science Museum Identifier: 1994-7268 Go to resource More Like this...
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