Bidspirit auction | Soviet Union Collection of Sheets

Soviet Union Collection of Sheets and Large Blocks - 1951, Konstantin Tsiolkovsky, 40k gray black on blue paper, small size stamp, unfolded complete sheet of 100, nice and post office fresh, full OG, NH, VF, C.v. $2,000++, SC.v. 180,000P , Sc. #1582