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Experimental Model 14H81C Carryphone53 views
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Carryphone Antenna Adapter plus53 views
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Model 2 - Carryphone53 views
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Carryphone II53 views
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First Installation of Individual Carrier Units. - West End of Aspinwall Interlocking - Etna, PA - PRR53 views
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P.R.R. Highway Crossing Case at Sandusky St. - Bucyrus, Ohio53 views
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Union Pacific R.R. - extra #1410 from inside Relay House at Madena53 views
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Photo of New Relay House53 views
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I.T.C. Equipment Box for EMD Diesel Engines with units removed53 views
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Back view of Control Station with door open to show wiring53 views
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Style "SCU" Transmitter with Frequency Standard53 views
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Style "SCU" Equipment Box with Transmitter53 views
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White Sulphur Springs, W.Va. - C. & O. Rwy.53 views
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Wabash eastbound freight trailing through S-1 facing point lock spring switch, Birmingham, Mo, about 45 mi. per hr.53 views
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Double automatic signal location south of LaGrange, Ohio. Northbound passenger No. 146 approaching - Big Four RR53 views
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Highway crossing sign - Reflector Buttons53 views
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Style M-4 Electric Switch Machine53 views
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Style M-4 Electric Switch Machine53 views
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53 views
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53 views
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YM-1 Electric Switch Machine for Yard Application53 views
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Switch Circuit Controller53 views
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Switch Circuit Controller53 views
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U-6 Switch Circuit Control53 views
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Buffer Spring Head Rod53 views
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53 views
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Spring Switch installation, Wabash R.R.53 views
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Spring Switch installation on the P.& L.E. RR at New Castle, PA53 views
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Wabash eastbound freight trailing through S-1 facing point lock spring switch. Birmingham, Mo., about 45 or 50 mi. per hr.53 views
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Spring switch installation at Carden, Kan. near Marysville - Union Pacific RR53 views
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A.C.L. Manchester to Waycross CTC T-21 Switch Stand at N.E. Manchester53 views
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A.C.L. Tampa to Sanford CTC T-21 at Plant City53 views
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