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Positions of signals81 views
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Light indications of signals77 views
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Positions of signal levers92 views
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Position of light signals79 views
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Retarders - Let Air do the work68 views
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Retarders - Let Air do the work68 views
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Drawing - "First Block System"78 views
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Drawings for advertisment R-2402 - "There's a better way to communicate today"69 views
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Drawing for advertisment R-2402 - "There's a better way to communicate today"74 views
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Line drawings for advertisment S-3730 "Union I.T.C. speeds car icing on the P.R.R."67 views
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Map of C.T.C. machine Installations71 views
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Map of C.T.C. machine Installations66 views
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Line drawings - Coded track circuits Universal in application66 views
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Line drawing of Shelf Mounting for Plug-In Relay72 views
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Line drawing - How a Mechanical Facing Point Lock works70 views
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Redispatching by C.T.C.74 views
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R.R. map of U.S.A.67 views
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Line drawing Moulded rubber coil Receiver66 views
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Drawings for Ad - Consolidate Control of Interlockings69 views
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Drawing for Ad - Consolidate Control of Interlockings64 views
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Line drawing Car Retarder Speed control62 views
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Infomat67 views
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"Between two wires" - Infomat69 views
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Broad and Narrow Band Control - Interlocking65 views
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Line Drawing "I.T.C. in caboose" for advertisement64 views
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Line drawing for I.T.C. Plug-In Units63 views
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"Greetings from a friend" (line drawing for advertisement)68 views
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Wash drawing for Self-restoring Dragging Equipment Detector for advertisement64 views
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Line drawing H-5 Searchlight Signal for advertisement82 views
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Line drawing for Relay House advertisement66 views
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Line drawing of Car Retarder advertisement64 views
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Speed Governor71 views
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