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Most viewed - E.P. Interlocking
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 E.P Interlocking Machine - West Approach - Newark Bay Draw372 views(Elizabeth port)
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 Phillipsburg E.P. Machine363 views
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 Control and Interlocking Machine, Newark Bay Draw362 views
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 Phillipsburg E.P. Machine341 views
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 Newark Bay Draw336 views
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 Newark Bay Draw335 views
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 Walk way or gallery under machine - Tower A, Boston318 viewselectric lights and portable attachment are show, also entrance to machine floor at far end - this is also entrance to relay room at near end
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 E.P Interlocking Machine - East Approach - Newark Bay Draw298 views
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 E.P Interlocking - Stewart241 views
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 Model 14 Interlocking Machine - North Approach - Chicago Union Station200 views
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 Dallas Terminal Interlocking Machine185 views
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 Model 14 Interlocking Machine - South Approach - Chicago Union Station172 views
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 C&W.I RR.168 views
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 Machine in tower A with front panels removed165 views
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 The track model and part of interlocking machine, Waterman Tower, Galesburg157 views
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 Looking toward terminal from draw span - B&M General office building left, Manga hotel right, terminal station center157 views
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 Model 14 Interlocking Machine - South Approach - Chicago Union Station155 views
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 Montclair Tower - Lackawanna Electrification151 views
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 E.P. interlocking with track diagram and release, Waterman Tower, Galesburg149 views
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 CW&I R146 views
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 View of tower "A"145 views
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 Birds eye view from left hand side of terminal - Bunker Hill monument on right142 views
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 Machine wiring, asbestos duct and recess in floor - Tower A, Boston142 viewsRoom to work without being cramped
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 Dallas Terminal Interlocking138 views
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 E.P Interlocking - Stewart138 views
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 Model 14 Interlocking Machine - North Approach - Chicago Union Station136 views
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 Night birds eye view of terminal from left hand side136 views
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 Lackawanna Electrification135 views
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 Clearing Yard Hump - Push Button E.P. Machine135 views
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 CW&I R134 views
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 Hanna Coal Co. - Georgetown plant - E.P. Interlocking134 views
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 E.P. Interlocking machine in Tower H133 views
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