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

Imperial Russia

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Start price: $75

Buyer's premium:

1871 (August 7 – Julian Calendar), entire folded letter from St. Petersburg to London, franked by vertical pair of 10k brown and blue on horizontally laid paper, arrived to London on August 23 (Gregorian Calendar), e.g. two days after sending, usual folds, F/VF, Est. $150-$200, Scott #23