NATIONAL STOVES & FURNACES by Excelsior Stove & Mfg. Co. Illinois, Blotter Great vintage advertising!   Size is 9-1/2" x 4". In used condition.   Some corners and edges are bumped, some might have edge tears.  Some may have pen marks on the front and back, discoloration due to wear, use, handling.   Some may have spotting and marks on the back also.