1855 (Mar. 18) Philadelphia, Pa. to Dresden, Saxony, mourning cover with red "Philadelphia Pa. Mar 18" cds and matching "Paid 30" rate h.s., red "N. York Am. Pkt. 'Paid 7' Mar 21" exchange credit cds, carried by Collins Line Nashville from New York Mar. 21 to Liverpool arriving Apr. 3, Carried on the only mail voyage of the Nashville for the Collins Line. Estimate  $400 - 600. Nashville was chartered by the Collins Line to carry mails for one round voyage only as a substitute for Pacific. Since Philadelphia was not an exchange office for Prussian mails, New York did the treaty accounting showing the credit to Prussia. $0 (Image)