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:

1906, 5r dark blue, green and pale blue, printed on vertically laid paper, perforation 11½, nicely centered, full OG, LH, VF, C.v. $500, Est. $250-$300 , Sc. #71a