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

Russian Air Post Stamps - Air Post Official stamps

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Start price: $250

Buyer's premium:

1922, red surcharge 600m on Consular stamp of 3r black green on rose and green network, vertical pair of types I and II from positions 6 and 11 of 25-stamp setting, full OG, top stamp is hinged, bottom one – NH, VF and scarce in pair, expertized by Z. Mikulski, C.v. $700 as singles, Est. $400-$500, Sc. #CO4