Auction: 19010 - The Philatelic Collectors' Series Sale
Airmails of the World
The Ted Proud Collection
1937 (9 Mar.) commercial envelope registered from Singapore to Argentina, franked at $4.75, carried on Imperial Airways service IW529. On reaching Marseilles it then left on Air France service to South America. Rare, see Proud Vol. 1, page 214. Photo
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