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

Russian Air Post Stamps

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Start price: $200

Buyer's premium:

1955, North Pole to Moscow Flight, red overprint on 2r black and yellow green, horizontal pair, left stamp with wide space between ”Sev.” and ”Polus” (length 15mm), right one without dash variety, full OG, NH, VF and scarce, Soviet Philatelic guarantees on reverse, Est. $300-$400, Sc. #C96 var