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: $200

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1927-30, Hague Air Post Conference, 10k and 15k, complete set of two, plus 15k with red color permeated on gum side and olive green in very pale shade (LH), Zeppelin issue, 40k and 80k, two complete sets, perforation 12½ and 10½, all with full OG, NH, mostly VF, C.v. $653++, Scott #C10-11, C12-13, a