its not a former SD50. It started life as a CP Rail SD40-2. All of the PR30C's have been built using SD40-2 core units. Progress Rail has only used SD50 core units for NS PR43C's #4000 and 4001 as well as PRLX #4300.started out as an SD50 then PRLX 3006 in a quasi UP paint scheme before this.
RailroadBookstore.com - An online railroad bookstore featuring a curated selection of new and used railroad books. Railroad pictorials, railroad history, steam locomotives, passenger trains, modern railroading. Hundreds of titles available, most at discount prices! We also have a video and children's book section.
ModelRailroadBookstore.com - An online model railroad bookstore featuring a curated selection of new and used books. Layout design, track plans, scenery and structure building, wiring, DCC, Tinplate, Toy Trains, Price Guides and more.