Original 1950 GMC Truck Dealer Parts Book Supplement. This Parts Catalog Supplement [January, 1950] covers the Light Duty Model FC-100, FC-150, FC-250, FC-280, FC-300, FCS-300, FC-350, FF-350 Trucks. This Supplement has only the new or updated Parts for the 1950 Series that are different from the 1949 Parts Book. This is what the Dealer used to order Factory Replacement Parts to Repair your Truck. It has Part Numbers, Group Numbers, Description, Quantity, Application and no Illustrations. It is in good condition with minor wear, blemishing and soiling from use in a Dealership [see photos]. Very rare and informative tool for the GMC Owner or Collector.