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Title: model 6-lever mckenzie & holland signal frame [Go to resource]
Description: Model 6 lever McKenzie and Holland Cam and Tappet signal locking frame 1887 (scale 1:4). License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: model signal frame Temporal: 1887 Source: Science Museum Creator: McKenzie & Holland Identifier: 1925-663 Go to resource More Like this...
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