1852 (Feb. 18) San Francisco Cal. to Manchester, England, folded cover with red "San Francisco Cal. 18 Feb" cds with matching "Paid" and "29" rate handstamps, red "19" credit h.s. to G.B., carried by Cunard Line America from Boston Mar. 17 to Liverpool arriving Mar. 29, red Liverpool (3.29) cds, Manchester (3.30) arrival backstamp, Very Fine, very few examples of the "29" rate marking have been recorded. Estimate  $300 - 400. Letter carried by Pacific Mail Steamship Co. steamer Panama from San Francisco to Panama City and by U.S. Mail Steamship Co. steamer El Dorado from Chagres to New York. Under U.S.-G.B. Convention, U.S. internal portion of total rate from West Coast was 10¢ from 1 July 1851, or 5¢ more than other locations in the U.S. $0 (Image)