DavidB submitted a new resource:
A Great Western Railway Signal Box - Souvenir from Empire Exhibition, Wembley, 1925
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A Great Western Railway Signal Box - Souvenir from Empire Exhibition, Wembley, 1925
Souvenir from Empire Exhibition, Wembley, 1925. The booklet describes a typical box, the equipment and way it works. A simple, interesting guide.
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