Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 1

Worldwide Air Post Stamps and Postal History - United States - Alaska - Emergency Arctic Flight

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Start price: $150

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1925, Polar Bear and Iceberg, 10(c) in various color combinations on white paper, set of 12 different triangle stamps, a few with minor flaws, all with large part of OG, F/VF and scarce, Est. $300-$400