This vintage Chesapeake and Ohio Railroad Affirmative Check System Book from March 1, 1920 is a unique piece of transportation history. It provides insight into the practices of the C&O Railroad and its operations during that time period. Containing a comprehensive affirmative check system, this book was an essential tool for railroad conductors and engineers. It also features information on train schedules, routes, and regulations. A must-have for any collector of railroadiana and trains, this item was manufactured in the United States and is a rare find for those interested in transportation history.  Reach out with additional questions or pictures, 2 available.  Thanks for looking.