The product is a 1955 Technical Manual for the Department of the Army, specifically focusing on the diesel engine General Motors series 6-71. This manual is an original piece and was produced in the United States.
A valuable resource for collectors or enthusiasts interested in military history and engineering, this manual provides insights into the maintenance and operation of these diesel engines used by the Army in the mid-20th century.
Please let me know if you have any questions or need any additional information.