Four Electro-Motive Division General Motors manuals. The first is an engine maintenance manual for Model 567B engines, 2nd edition, March 1950. The second is an Enginemen's Operating Manual for Model GP7 locomotives, 2ne edition October 1950; Operating Manual for 600 HP and 1200 HP switching locomotives, 5th edition, January 1950, and Training Manual for GM diesel locomotives dated January 1952, all in good to very good condition.