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Title: Telegrah Block Instrument; Lancashire & Yorkshire Railway, 3 [Go to resource]
Description: Telegrah Block Instrument; Lancashire & Yorkshire Railway, 3 position type, complete with tapper (claimed ex BR-Clapham) License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Source: Science Museum Identifier: 1994-7121 Go to resource More Like this...
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