Original 1916-1928 Chevrolet Dealer Four Cylinder Models Parts Book [dated effective March 1, 1939]. This Parts Book covers the available Factory Replacement Parts for these Models. This is what the Dealer used to order Parts to repair your Chevy. It has Part Numbers, Description, Application and Illustrations for these available Parts. It is in good condition with minor wear, blemishing and soiling [see photos]. Very hard to find and informative book for the Chevy Owner or Collector.