1849 (Jun. 4) Philadelphia, Pa. to London, England, folded letter with blue "Philadelphia Pa. Jun 4" cds and matching large "Paid 24" rating h.s., red Boston "19" credit h.s. to G.B., carried by Cunard Line Caledonia from Boston Jun. 6 to Liverpool arriving Jun. 18, red London (6.19) arrival d.s., Very Fine and choice, one of only five recorded examples of this Philadelphia "Paid 24" rating handstamp. Estimate  $300 - 400. From April - June 1849, Philadelphia used a large block-style handstamp in blue to show prepayment of the 24¢ international rate. Although the Boston exchange office did not use a circular datestamp, the red credit marking was struck at Boston. $0 (Image)