Original vintage mining magazine ad for JEFFREY MANUFACTURING COMPANY. Main office and factory was located in Columbus, OH.  If Machine Runners Had To Buy Their Own  Shortwalls, More Would Buy Jeffrey.  Pictured is a Jeffrey 35-BB Shortwall at the Red Jacket Coal Company's No. 5 mine.  Old two-page gatefold 1928 coal mining equipment industry advertisement.  Would display beautifully matted and framed!  page size approximate 9 x 12 inches.