Reproduced full size on 8 ½ x 11 paper. This is a reproduction of an official 139 page Chesapeake & Ohio Railway Steam Locomotive Diagram Book. The diagrams in this booklet are drawn to Advisory Mechanical Committee standards used by all the railroads under the Van Sweringen System in the 1920's and 1930's (C&O, NKP, PM, HV, Erie). Diagrams are reproduced full size. Updates by the railroad through 1936 have been incorporated. It includes tender assignment pages for each locomotive class, engine by engine.