Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World. Part 3

Imperial Russia

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Start price: $150

Buyer's premium:

1857, 10k brown and blue, four-side margin imperforated single with numeral watermark ”1”, pen cross cancellation, VF, C.v. $475, Est. $200-$300 , Sc. #1