Two stamps of USSR from series "Soviet air expedition landing on a drifting research station "North Pole 1", 40 kopecks, gray-green, red, 80 kopecks carminic, red, offset printing on thick white paper, without watermark, with gum, imperforated. Condition: original gum, never hinged, matt spot at the bottom of mark. Price in SC catalog - 180000,00 roubles.