1858 (May 24) Dubuque Iowa to Wurttemberg, Germany, buff cover bearing 10¢ green, type I (31) pair and single, tied by "Dubuque Iowa. May 24 1858" cds, endorsed "By Prussian closed mail", red "N. York 'Paid 7' Am. Pkt. May 27" exchange credit cds, carried by Cunard Line Persia from New York May 27th to Liverpool arriving Jun. 6th, red Aachen Franco (6.8) framed transit, red crayon "2-" due rating, Stuttgart (6.10) and Jun. 11th arrival backstamps; left 10¢ with small nick at left, Very Fine, Cat. $3,800 as off-cover pair and single; with 1988 P.F. certificate. Estimate  $750 - 1,000. Cover prepaid for 30¢ Prussian Closed Mail rate effective October 1, 1852 to August 31, 1861. $0 (Image)