1856 (Feb. 20) San Francisco, Cal. to Amsterdam, Netherlands, folded cover with red "San Francisco Cal. 'Paid 26' 20 Feb" integral rate cds, red "New-York Mar 22" exchange cds, carried by Ocean Line Hermann from New York Mar. 22 to Southampton arriving Apr. 7, London (4.7) transit backstamp and "U.S. PK. T." straightline h.s. with manuscript "4" pence debit to Netherlands, Amsterdam arrival backstamp and manuscript "40" Dutch cents due rating, minor bleach spot in address, F.-V.F. and scarce San Francisco use to Amsterdam. Estimate  $200 - 300. Letter, prepaid West Coast British Open Mail rate by American packet, carried by Pacific Mail Steamship Co. steamer "Sonora" to Panama and U.S. Mail Steamship Co. steamer "George Law" to New York. London marked the U.S.PK.T. to show basis for G.B. debit to Netherlands (letter paid to England, leaving only transit to Netherlands unpaid). Dutch postage due consisted of 4d or 20 cents to G.B. and 20 Cents internal fee in the Netherlands. $0 (Image)