1936 LARGE ENVELOPE SENT REGISTERED AIR MAIL LONDON TO ARGENTINA WITH KGV 1½d and £1 P.U.C. (SG438). Fine larger envelope sent registered air mail 'Via France' from London to Buenos Aires, Argentina with KGV 1½d photogravure (SG441) x 2 and fine £1 P.U.C. (SG438) with neat strikes 'REGISTERED/London Chief Office' oval date stamps 13 MCH 36. A rare and attractive commercial usage. (Ref 141353).
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