1937 MAIL LONDON TO BRAZIL 10S SEAHORSE (SG452). Envelope (259 x 122) London to Sao Paulo, Brazil with a fine 10s re-engraved Seahorse (SG452) and 6d purple (SG426a) cancelled LONDON/AIR MAIL date stamps in purple 28 MAY 37. On reverse SAO PAULO receiver 2.VI.37. Fine usage. (Ref 104982).
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