1861 (Apr. 6) Cincinnati Oh. to Switzerland, cover bearing 10¢ green (35) vertical strip of three, tied by two strikes of blue "Cincinnati O. Apr 6" duplex, red "N. York Br. Pkt. '7 Paid' Apr 10" exchange cds, carried by Cunard Line Africa from New York Apr. 10th to Queenstown arriving Apr. 21st, red "Aachen Franco 23 / 4" framed transit and framed "Franco / Preuss. Resp. Vereins. / Ausgangs. Grenze." three-line framed handstamp, blue manuscript "3" sbr. debit rating, Zurich (4.25) backstamp, 10¢ affected from edge placement with bottom flap refolded. Estimate  $400 - 600. This cover was prepaid 30¢ only for postage to the Prussian border only. The red "Franco Preuss. Resp. Vereins. Ausgangs. Grenze." framed handstamp translates to "Paid Prussian Union Members Deliver to Border" was applied by the Aachen exchange office. $0 (Image)