Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 1
Lot 91:
1929 (November 6), The Hubert Wilkins Antarctic Aerial Expedition, cover from Port Stanley to South Shetlands, franked by King George V and Penguins 1p scarlet, violet Exhibition marking, South Shetlands ”JA. 6.30” date stamp, Wilkins’ autograph, mounted on page from a Collection, VF and scarce, Est. $400-$500, Sc. # 55
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