 Most viewed
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Tidewater Associated Oil Co. Field Station53 views
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RV-4253 views
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Copper oxide Rectifier assembly53 views
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Union Pacific R.R.- carrier equipment in C.T.C bldg. - Salt Lake City53 views
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Style GP-100 Solid State Carrier System53 views
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Style GP-100 Solid State Carrier System53 views
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NYCTA 541 Solid State System (Test Rack)53 views
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Receiver for Carrier for 540-B System53 views
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Transmitter for Carrier for 540-B System53 views
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Birmingham, Mo.52 views
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Glencoe to Milbank52 views
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Aberdeen - Mobridge52 views
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Aberdeen - Mobridge52 views
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Mamouth to Mobridge52 views
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Savannah Installation52 views
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C.T.C. for N.Y.C.& St.L.52 views
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Thornton52 views
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Thornton52 views
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Thornton52 views
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Westbound freight at signals R4, R6, with switch machine 3, 7 and 11 in foreground, Wampum52 views
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Looking west at signal location R4, R6, Wampum52 views
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Interior of 8-1/2 x 12 ft. steel instrument house located at Wampum52 views
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Looking west at B.& O. Jct. switch movement A-19 in foreground52 views
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Looking west showing inductors at signal R4, R6, Wampum52 views
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Looking west at signals R4, R6, showing B.& O. eastbound freight52 views
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2 ft. 8 in. steel instrument case at switch lock location 16, Newport52 views
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Rear of westbound freight at signals L-4, L-10, Wampum52 views
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8-1/2 x 12 ft. streel instrument house showing cable inlet and eastbound passenger train at Wampum52 views
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Westbound freight and eastbound passenger passing signal locations L-4, L-10 Wampum, located at overhard crossing of P.R.R.52 views
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Lecheria station looking south into CTC territory52 views
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Emp. Lecheria - signal I-48 in foreground52 views
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CTC Installation52 views
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