1876 Centennial Anniversary, Philadelphia, brown illustrated design on fresh cover to Boston, Mass., franked with 1873, 3¢ green tied by "Philadelphia, Pa., Apr 13" cds and cork duplex, blue 1876 company corner card date stamp, Extremely Fine, a lovely cover and design; with 2013 P.F. certificate. Scott No. 158  Estimate $300 - 400. $0 (Image)