An original serial number tag from a case Plow Works-manufactured Wallis tractor drug the line into the rivalry between J.I. Case Threshing Machine Co. and J.I. Case Plow Works Co.: "We want the public to know that this is not the tractor made by the J.I. Case Threshing Machine Co., Racine, Wis.," the tag reads.
Photo Courtesy LeRoy M. Jennings