1857 (Jun. 30) Hamburg to New York, N.Y., blue folded cover with Hamburg datestamp and matching "5" cent debit to U.S., carried by Hapag Line Hammonia from Hamburg Jul. 1 to New York arriving Jul. 16, "N. York Hamb. PKt. '10' Jul 16" exchange debit cds, New York carrier pencil "12" final due rating, hor. file fold, Very Fine, This was carried by Hammonia on the first mails into New York under the new U.S.-Hamburg Treaty on this voyage. Estimate  $500 - 750. The U.S.-Hamburg treaty went into effect on July 1, 1857. Hamburg debited the U.S. 5¢, this time with a handstamp (only example recorded of this accounting mark). The pencil "12c" was marked by a New York letter carrier reflecting the 2¢ carrier charge in the postage due. Such chance notations are quite scarce on transatlantic covers. $0 (Image)