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

Worldwide Air Post Stamps and Postal History - Czechoslovakia

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Start price: $150

Buyer's premium:

1922, inverted black Airplane surcharges 50h on 100h and 100h on 200h, large part of OG, VF, both are properly expertized, C.v. $300, Scott #C7a, C8a