International Exhibition, Philadelphia/-1876-/United States Centennial Commission. Purple printed corner card at top left of cover franked with 3¢ Bank Note tied by segmented cork with Philadelphia, Pa. cds alongside, also handstamped with double circle "U.S. Centennial Commission/Aug. 2, 1875/Phil'da, Pa." handstamp, slightly reduced at right, Very Fine, a very rare marking. Estimate  $100 - 150. $0 (Image)