1937 MAIL LONDON TO BRAZIL/5S SEAHORSE (SG451). Envelope (230 x 102) London to Sao Paulo, Brazil with fine 5s Seahorse (SG451) and pair of KGV 1s photogravure (SG449) cancelled LONDON date stamps 11 SEP 37 in purple. Envelope slight creasing largely clear of stamps and on reverse SAO PAULO receiver 15.IX.37. Good franking. (Ref 108474).