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: $100

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1913, Romanov Dynasty, Nicholas II, 10k blue, in addition design is printed on gum side and placed diagonally upside down, full OG, NH, VF and a spectacular not offset, but printed error, Est. $150-$200 , Sc. #93 var