Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 3

Soviet Union

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Start price: $150

Buyer's premium:

1927, definitive issue, peasant 7k dark red, block of four, right stamps with additional vertical impression of control line from margin, red offset on reverse, horizontal invalidating perforations across the design, full OG, NH, VF, Est. $250-$300, Sc. # 388 var