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Title: Mounted photo 6"x8" of Westinghouse 3-position upper quadran [Go to resource]
Description: Mounted photo 6"x8" of Westinghouse 3-position upper quadrant electric signals, Ealing Broadway, Ealing & Shepherds Bush Railway License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: photograph Source: Science Museum Identifier: 1925-719 Go to resource More Like this...
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