Bidspirit auction | Soviet Union - Issues of

Soviet Union - Issues of 1938-1939 - 1938, Papanin's North Pole Expedition, 50k ultramarine, horizontal imperforated pair with beautiful margins all around, full OG, NH, VF and rare in sound condition, Raritan Stamps guarantee, C.v. $4,700++, Est. $3250-$4,000, Scott #646a