Original vintage mining magazine ad, ROBERTS AND SCHAEFER COMPANY of Chicago, IL.  Approved and Selected Menzies Hydro-Separators.  In the last three months eight coal operators have purchased eighteen Menzies Wet Process coal Cleaning Plants.  Pocahontas Fuel Company Cherokee Mine in Ashland, WV. Upland Coal and Coke Company of Elkhorn, WV.  Crozer Coal and Coke Company of Elkhorn, WV.  Page Coal and Coke Company of Pageton, WV. Peerless Coal and Coke Comapny  of Vivian, WV. Powhatan Coal and Coke Company of Powhatan, WV. Berwind-Whtie Coal Mining Company of Windber, PA.  Lynchburg Coal and Coke Company of Kyle, WV.   Old 1928 dated coal mining industry equipment advertisement. (The scan shows a slight bluish tint that is not on the actual ad.)

Approximate page size  9 x 12 inches.