Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 2

Austria

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Start price: $150

Buyer's premium:

1919, Coat of Arms, 10k light violet, printed on granite paper, type II, block of 50 (10×5), full OG, NH, VF, C.v. $1,300++, ANK #211 II, C.v. €1,750, Est. $300-$400, Scott #175