94 sheets reprinted in 6 ½ x 14 paper. This is a reproduction of an official 139 page Pere Marquette 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 1947 have been incorporated. It includes tender assignment pages for each locomotive class, engine by engine.