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It is a great honor to be able to share with you the DT&I interchange diagrams, circa 1930. These blueprints are essential for understanding some of the basic operations of the line. All scans are original, except for Fayne and Gregg's which are recreations.
A big thanks to Joe Swogger and Jim Henry for sharing these diagrams from their collections.
NOTE: These are PDF files and are rather large in size.
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