1955 AIR MAIL CHELSEA, LONDON TO NEW YORK, USA WITH KGVI 2/6 YELLOW-GREEN (SG509). Air mail envelope, 230 x 103 Chelsea, London to New York, U.S.A. with very fine 2/6 yellow-green (SG509) cancelled 'CHELSEA' 15 AUG 1955. Filing fold well clear of stamp. (Ref 104109).
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