MAKE A MEME View Large Image Model 14 EP machine Baltimore Union Jct.jpg interlocking machine manufactured by Union Switch Signal Co Installed at Union Junction Interlocking Tower Baltimore Maryland in 1935 for the Pennsylvania Railroad The tower was closed in 1987 ...
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Keywords: US&S Model 14 EP machine Baltimore Union Jct.jpg interlocking machine manufactured by Union Switch Signal Co Installed at Union Junction Interlocking Tower Baltimore Maryland in 1935 for the Pennsylvania Railroad The tower was closed in 1987 Cropped photo Library of Congress Prints and Photograph Division Historic American Engineering Record LOC-image hhh md0888 William E Barrett 1983-03 MD-50-4 PD-USGov Union Junction Tower Interlocking machines Union Switch and Signal
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