This F-20-Class flat car with Bettendorf trucks was built in 1956 at B&O’s Du Bois shops and rebuilt by Chessie System in 1975. It was used in a general-purpose capacity, often used to transport large industrial and structural cargo. Chessie System was formed through the 1972 mergers of Chesapeake & Ohio, Baltimore & Ohio, and Western Maryland. It was one of the largest Class 1 railroads until 1986 when Seaboard System merged with Chessie to form CSX Transportation.