1855 (Apr. 3) Troy, N.Y. to London, England, two covers from same correspondence with red "Troy N.Y. '24' " integral cds and matching fancy "Paid" handstamps, Apr. 3rd cover sent by American packet with New York "3" credit h.s. to G.B. and carried by Collins Line Atlantic departing New York Apr. 4 to Liverpool arriving Apr. 18; Sep. 12th sent by British Packet with Boston "19" credit h.s. to G.B. and carried by Cunard Line Canada from Boston Sept. 12 to Liverpool arriving Sept. 23, a Very Fine exhibition pair. Estimate  $200 - 300. Troy, New York was one of the few U.S. cities that used a special circular datestamp to show the full prepayment for British treaty mails. The "24" in pencil on each cover was undoubtedly was placed on the envelope when the letter was taken to the Troy post office and prepaid. Later, the Troy circular datestamp was applied in a separate operation. $0 (Image)