Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 1
Lot 13:
FIRST INTERNATIONAL ROCKET FLIGHT USA – MEXICO: 1936 (July 2-3), dark brown cover souvenir booklet, containing imperforate triangle single stamps and sheets of four 50c in red and blue (USA-Mexico) and in green and red (Mexico – USA), as well as two covers for direct and return flights, generally fresh and mostly VF, Est. $300-$400
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