Original vintage coal mine magazine ad PENNSYLVANIA MINING MACHINERY CORPORATION. of St. Benedict, PA.  and at 2007 Graybar Building (Grand Central Terminal) New York City, NYC. Pictured is one of the Peale-Davis plants, of 200 to 250 tons per hour capacity, installed in Central Pennsylvania. "Dry Wash 3" to Dust Without Pre-Sizing with Peale Davis 'Pneumo-Gravity' Process". Pennsylvania Mining Machinery Corp.,  Old 1928 dated mining equipment advertisement.  Would look sensational matted and framed! 

Approximate size 9 x 12 inches.