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

Imperial Russia

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Start price: $150

Buyer's premium:

1917, 15k lilac and blue, neat double impression of the design in horizontal gutter block of four, full OG, hinged on gutter and bottom left stamp, 3 stamps are NH, VF, Est. $250-$300, Scott #81 var