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

Worldwide Air Post Stamps and Postal History - Vatican City - Pioneer Flight

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Start price: $150

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1931 (July 9-10), First Flight Rome – Athens – Thessaloniki, mixed franking cover of Vatican City 25c and Italy 50c in block of four, cancelled by Vatican ”8.7.31” and Rome ”9.7.31” ds, arrival and transit markings, mostly VF and rare, only 22 items carried, Est. $300-$350, Scott #4