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: $75

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1927 (April 19-20), Pioneer Flight Prague – Braunschweig registered cover, franked by four stamps, including complete set of air post surcharges, all appropriate markings and arrival ds, mostly VF,Scott #C7-9