Original vintage mining magazine ad for THE JEFFREY MANUFACTURING COMPANY. Main office and factory was located in Columbus, OH. It Hugs The Face Increasing Safety on Long Faces.  Photos show the very close setting of timbers that is possible while cutting a long face with the Jeffrey Longwall Coal Cutter. Jeffrey Longwalls are designed for mines like these, where every additional inch of timbering space means increased safety. Old two-page gatefold 1928 dated coal mining equipment industry advertisement.  Would display beautifully matted and framed!   Page size approximate 9 x 12 inches.