The C&O 82000-82999 series double door auto boxes were built 1924-25 by Illinois Car, and the 83000-83999 in 1924 by Pullman Car. The latter series was originally Hocking Valley cars.
The source material comes from the excellent Chesapeake & Ohio Freight Cars 1937-46, Shaver, Kresse and Parker, published by the C&O Historical Society, last reprinted 2104, pages 140-141.
In 1941-42 1184 cars were rebuilt with steel sheathing and various door configurations, and renumbered into the 12k and 13k series. In 1954 three cars had their roofs removed for coke service. I have never seen a photo of one of these.