(Austria) 1863, 2¢ black, Vertical Pair. In combination with 1863, 24¢ lilac (s.e. guideline at left), tied by quartered cork cancels on cover to Vienna, Austria, "Washington, D.C., Sep 3" cds and red "N. York Br. Pkt., 7 Paid, Sep 4" exchange cds additionally tying 2¢ pair, Colen transit and receiving backstamps, Very Fine, an attractive Prussian Closed Mail rate usage. Scott No. 73+78  Estimate $400 - 600. $0 (Image)