Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 2
Lot 2019:
1931 (May 20), registered air mail cover from Moscow to Switzerland, franked by two Airship values, tax stamp with black surcharge 5k on 100r orange is on reverse and tied by 8- line official cachet, the same day Berlin transit and Luzerne ”21.V.31” arrival ds, mostly VF, Est. $200-$250, Scott #C16, C18, SC #PE14
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