1863 (Jun. 13) London, England to Buffalo, N.Y., cover with London (6.13) cds and "19/cents" debit h.s. to U.S., carried by Cunard Line Canada from Queenstown Jun. 14 to Boston arriving Jun. 26, "Boston Br. Pkt. '24' Jun 26" debit exchange cds with "33 / In U.S. Notes" two-line depreciated currency h.s., Very Fine, an early depreciate currency marking from Boston. Estimate  $200 - 300. The Boston exchange office did not start using depreciated currency rates until June 1863. This is a very early use of a marking prepared to show the postage due in U.S. Notes (greenback currency). $0 (Image)