1 The present controversy grew out of the relationship, and course of dealing, between plaintiff in error, the manufacturer of Chrysler, Dodge, and Plymouth automobiles, hereinafter referred to as plaintiff, and the defendant in error, Walter E. Allen, Inc., which, for more than a decade, beginning in 1940, sold Chrysler and Plymouth automobiles in Oklahoma City as an authorized retail dealer. At all material times during this period, parts and accessories for all Chrysler-manufactured automobiles were distributed under the trade, or brand, name of "Mo-Par", by one of plaintiffs subsidiary corporations, Chrysler Sales Corporation. In various parts of the United States, this distribution was effected under contracts between that corporation and certain of its automobile dealers, who (in addition to handling such parts and accessories they used, or sold at retail) sold Mo-Par parts and accessories to others engaged in servicing and repairing Chrysler-manufactured automobiles.