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

Soviet Union

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Start price: $1,500

Buyer's premium:

1928, definitive issue, peasant 6k blue, horizontal position of watermark Borders and Rosettes, vertical gutter block of eight (2×4), sheet margins at top and bottom right, which confirmed that this item is originated from a sheet of 80 (20×4), full OG, NH, VF and rare multiple, Est. $2,500-$3,000, Sc. # 309 var