1859 (Jul. 19) Boston, Mass. to London, England, cover with "Boston Br. Pkt. 19 Jul" exchange cds and fancy "5" debit h.s. to G.B., carried by Cunard Line Asia from New York Jul. 20 to Liverpool arriving Jul. 31, London (8.1) arrival backstamp with black "1/-" shilling due h.s. for packet rate; Very Fine, This is the only recorded example of this London one shilling due rating handstamp. Estimate  $100 - 150. Surprising few examples of this marking have been seen, London often using a manuscript rate mark. $0 (Image)