The Volokolamsk RSFSR and Soviet Union Specialized Collection, Various Russian Stamps and Covers of other owners
Lot 572:
1931, Airship over the Arctic Region, 50k dark gray blue, error of color on thinned (no more then 0.075mm) paper, left sheet margin single, full OG, NH, VF (LH on selvage) and very scarce, Est. $500-$700, Scott #C23a var
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