Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 1
Lot 90:
Description
1931 (June7-9), two Pioneer Flight registered covers (presumably FDC), sent from Moscow to Berlin, franked by Airships 10k-1r, imperforate and perforated complete sets of five, tied by Moscow ”7.6.31” and ”8.6.31” date stamps respectively, each one with appropriate arrival ds on reverse, mostly VF, Est. $400-$500, Scott #C15-19, C20-24
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