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

Worldwide Air Post Stamps and Postal History - Soviet Union

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Start price: $100

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1937, Aviation Exhibition, souvenir sheet of four 1r black brown and buff, size 165x90mm, flawless item, full OG, NH, VF, C.v. $450, Est. $150-$200, Sc. # C75a