1869 (Jun. 12) Mobile, Ala. to Barcelona, Spain, folded cover bearing 1861, 10¢ green, F. grill, horizontal pair, tied by "Mobile Ala. Jun 12" duplex, red "New-York U.S. Pkt. Jun 16" exchange cds, carried by North German Lloyd Line Donau from New York June 17th to Southampton June 27th, London (6.28) transit and "Paid-Only/To England" two-line h.s., Barcelona (7.1) arrival backstamp and blue "12.Rs." reales due rating h.s., Very Fine, an uncommon rate to Spain; with 1989 APS cert. Scott No. 96  Estimate $300 - 400. Letter prepaid only the transit fees to G.B., leaving the remaining postage under the Anglo-Spanish Treaty of 1858 to be paid by the recipient. London used a special marking to show letter PAID-ONLY/TO ENGLAND. Since letter weighed between 15-22½ grams, it required three rates in Spain (note the manuscript "3," upper left). $0 (Image)