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

Soviet Union

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Start price: $750

Buyer's premium:

1939, Agriculture Exhibition, 1r blue, comb perforation 12×12½, raster vertical diamonds, neatly cancelled at top right corner, fine and extremely rare raster and perforation variety, which is known in used condition only, just a few stamps recorded, Est. $1,200-$1,500, Scott #733 var