Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - United States - Alaska - Emergency Arctic Flight - 1925, Polar Bear and Iceberg, 10(c) in various color combinations, 11 perforated and one imperforate triangle stamps printed on yellow paper, some duplications, all with large part of OG, F/VF and scarce, Est. $300-$400