1938 2/6D SEA HORSE (SG450) ON COVER TO ARGENTINA. Envelope London to Buenos Aires endorsed "VIA AIR FRANCE" with fine 2/6d re-engraved Sea Horse (SG450) in a darker shade, also 6d block cypher (SG426a) and 1s photogravure (SG449) cancelled LONDON 21 MY 38. On reverse BUENOS AIRES receiver 25.5.1938. (Ref 99754).
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