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

Imperial Russia - Proofs from the Tsar Collection

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Start price: $600

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1913, Tercentenary of the Romanov Dynasty, Paul I, imperforated large die proof of 35k in deep orange, printed on chalk-surfaced thick paper, size 48x63mm, very light trace of hinge, VF, Est. $1,000-$1,200 , Sc. #98