Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 1
Lot 93:
Description
1941 (February 10-11), Aeroflot First Flight two registered covers delivered on line Moscow – Minsk – Vilnius – Kaunas – Riga by airplane ”PS84” (Li-2, Douglas DC-3), franked by Balloons and Planes 50k and 80k or 30k and 1r, met appropriate rate of 1.30rub, arrival ds on reverse, VF, Est. $300-$350, Scott #682-86
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