Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 2

Soviet Union 1923-91

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Start price: $100

Buyer's premium:

1959, Frederic Joliot-Curie, two stamps of 40k green and black brown on tan or pale beige paper, each one has small frame (20.7×31.4mm) and small portrait varieties, full OG, NH, VF, common stamps with large frame (21.4×32.4mm) and large portrait on tan or beige paper are included for comparison, Est. $200-$250, Scott #2171, var