Author/publisher Tom Dixon Jr. with Karen Parker developed this book on the first classes of diesel switchers to come on the C&O property. Switchers like the SW1, SW7, SW9, NW2, TR3, S2, and S4 were the pioneer diesel switchers that started the anticipated conversion from steam to diesel. This is a 64-page b&w softcover with 16-pages of color images. Gloss paper. New shrinkwrapped copy. 

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