Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World. Part 3
Lot 1239:
1951, Russian Scientists, 40k in various colors, four stamps used on two covers, one from Moscow to Leningrad (3 stamps), the other one from Leningrad to Moscow (1 stamp franking), fresh and VF, Est. $150-$200 , Sc. #1569, 1575, 1580
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