The Bachmann Chessie System C&O #7071 F7 Locomotive Engine Diesel is a vintage model replica of a Chessie System F7 diesel locomotive in HO scale. It features a yellow color scheme, Bo-Bo wheel configuration, and is a replica of the original F7 locomotive. This untested model is a great addition to any model railroad enthusiast's collection, showcasing the historic Chessie System corporate roadname and the craftsmanship of Bachmann. Untested.