History of Aviation, Rare Stamps and Postal History of the World, Part 2
Lot 900:
1941, inverted dark red overprint ”GK.-Ssarny” on 50k black, bottom margin single of type II, printed on dark violet glazed paper, tiny natural inclusion at left, no gum as issued, NH, VF and scarce, G. Krischke certificate, Mi #4A K, C.v. €3,000, Est. $600-$800
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