A Pennsylvania Railroad Engine Diagrams and Car Diagrams Book undated, but likely from the 1930's to 1940's. Show diagrams for Pennsylvania steam locomotives, some electric, and some passenger cars. The booklet measures 10 1/2" x 5 1/2" and has thick card board cover with hand written lettering. The binding is frayed along the top edge and the cover has some wear along the edges with a partially torn bottom right corner but the booklet appears to be complete. The interior pages show minor discoloration, edge wear and tear. Some pages have writing marks on the back. See photos for best description.