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Title: Semaphore signal arm, lower quadrant, Great Western Railway, [Go to resource]
Description: Semaphore signal arm, lower quadrant, Great Western Railway, backing signal, ex Castle Cary. License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: signal arm Source: Science Museum Identifier: 2002-7397 Go to resource More Like this...
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