Lot
585 
1861, 30¢ orange, horizontal pair, used with 3¢ rose (65) pair, beautiful early bright shades, tied by three clear strikes of Boston large "Paid" grid cancel on blue 1862 folded cover to Port Elizabeth, Algoa Bay, Cape of Good Hope, endorsed "via England, proof City of Washington" at top left, reverse with red "Boston Am. Pkt. Paid Jun 20" exchange cds and red crayon "12" for double the 6¢ credit to G.B., carried by the Inman Line City of Washington from New York Jun. 21st to Liverpool arriving Jul. 3rd, red London Paid (7.4) transit cds and red crayon "1" pence credit, red Cape of Good Hope Aug. arrival backstamp, Very Fine, ex-Knapp (lot label affixed); with 2007 P.F. certificate. Scott No. 71 Estimate $1,000 - 1,500.
A RARE 1861 ISSUE FRANKING FOR DOUBLE THE 33¢ BRITISH MAIL RATE VIA ENGLAND.
For some reason, London rated the letter as a single rate (1 pence) instead of the double rate (2 pence) for the British colonial postage.
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Realized: $1,800