1932, 50k carmine and 1r green, complete set of two, both with perforation L12 1/2, nicely centered, full OG, NH, VF, C.v. $315, Est. $150-$200 (Image)

1932, 50k carmine rose, perforation 10 1/2, well centered with large margins all around with a part of sheet margin at right, full OG with slight wrinkles as always, LH, VF example of this Air Post and Soviet Union rarity, ex-Maslowski, this stamp has been sold by Cherrystone Auction in April 2017, lot #128 for $11,500, C.v. $30,000, Est. $10,000-$12,000 (Image)

1932 (8.28), Franz Josef Land - Arkhangelsk Prospective Flight postcard and cover addressed to Vienna and Moscow, franked by International Polar Year single stamp of 50k or by a complete set of 50k and 1r respectively, the flight did not take place due to technical difficulties, all correspondences went from Arkhangelsk, all appropriate marking presented, mostly VF, Est. $200- $250 (Image)