Original 1939-40 Studebaker Dealer Service Manual. This Shop Manual is what the Dealer used to service and repair your Commander or President Car Model. It has information, specifications, troubleshooting, procedures and illustrations to aid in repairing these Cars. This is the 1939 Manual with the 1940 Supplement in the back. It is in good condition with minor wear and soiling [see photos]. Very rare and informative tool for the Studebaker Owner or Collector.