1930, Zeppelin issue, 40k dark blue and 80k carmine, imperforated complete set of two, each one with sheet margin at right or at left, full OG, LH, VF and eye-catching scarce set, C.v. $3,300 (Image)

1931, Airships, 10k-1r, imperforated complete set of five in vertical or horizontal pairs (20k), top stamp of 10k with thickened second ‘‘k’’ in ‘‘kopeek’’ variety, full OG, NH, VF (Image)

1931, Airship over the Arctic Region, 50k brown, two sheet margin blocks of four with perforation L12½, distinctly different shades, one has marginal only separation, post office fresh quality otherwise, full OG, NH, VF (Image)

1931, Airship over the Arctic Region, 50k brown, perforation L12½, a dot in ‘‘O’’ variety (position 44), full OG, VLH, VF (Image)

1931, Airship over the Arctic Region, 50k dark gray blue, error of color, nicely centered, full OG, LH, VF, C.v. $500 (Image)

1931, Ice-Breaker ‘‘Malygin’’, 30k-2r, imperforated complete set of four, all with bottom sheet margins, full OG (slightly disturbed on margin of 2r), NH, VF, C.v. $217 (Image)

1932, Ice-Breaker ‘‘Malygin’’, 30k-2r, imperforated complete set of four in vertical pairs, three of which with sheet margins, full OG, NH, VF (Image)

1932, International Polar Year, 50k carmine and 1r green, complete set of two, both with perforation 12, nice and fresh, full OG, NH, VF, C.v. $315 (Image)

1933, Stratostat ‘‘CCCP 1’’, 5k-20k, complete set of three, two with sheet margins, practically without usual gum waves, full OG, NH, VF, C.v. $373 (Image)

1934, Civil Aviation, 5k-80k, complete set of five, printed on watermarked Borders and Rosettes paper, full OG, mainly LH, VF, C.v. $350 (Image)

1934, Stratosphere Disaster, 5k-20k, complete set of three, premium centering, full original gum (unusually streaky on 10k value), NH, VF, C.v. $295 (Image)

1934, Stratosphere Disaster, 5k-20k, complete set of three, each stamp with a part of perfin ‘‘Obrazets’’, trimmed perforation by scissors in several places, full OG, LH, VF and scarce in complete set (Image)

1934, Airships, 5k-30k, complete set of five, nicely centered, full OG, LH (20k) or hinged, VF, C.v. $517.50 (Image)

1934, Airship ‘‘Lenin’’, 30k ultra, the ‘‘key’’ value of the set, large part of perfin ‘‘Obrazets’’, nicely centered, full OG, VLH, VF (Image)

1935, Chelyuskin Rescue, 1k-50k, complete set of ten, fresh quality, full OG, LH, VF, C.v. $1,032 (Image)

1935, Moscow – San Francisco Flight, red surcharge 1r on 10k dark brown, position 5 of 25-stamp setting, nice and post office fresh, full OG, NH, VF, Soviet Philatelic guarantee hs, C.v. $1,275 (Image)

1935, Moscow – San Francisco Flight, red surcharge 1r on 10k dark brown, position 13 of 25-stamp setting, basic stamp printed on paper with horizontal position of watermark Borders and Rosettes, which is very scarce, full OG, NH, VF, Soviet Philatelic guarantee hs on reverse (Image)

1935, Moscow – San Francisco Flight, red surcharge 1r on 10k dark brown, small ‘‘f’’ variety of surcharge, position 9 of 25-stamp setting, full OG, very light trace of hinge (appearing NH), VF, Soviet Philatelic guarantee hs on reverse, C.v. $1,500 (Image)

1937, Aviation Exhibition, 1r black, brown and buff, souvenir sheet of four, perfect condition, full OG, NH, VF, C.v. $400 (Image)

1937, Aviation Exhibition, 1r black, brown and buff, souvenir sheet of four, broken left wing of airplane variety (upper right stamp), full OG, NH, VF and unrecorded plate error (Image)

1937, Aviation Exhibition, 1r black, brown and buff, souvenir sheet of four, bottom right stamp with ‘‘moon’’ variety (buff round spot on stripe at the top), excellent quality, full OG, NH, VF (Image)

1937, Aviation Exhibition, 1r black, brown and buff, souvenir sheet of four, cancelled on a fragment of Special Delivery cover, which was sent from Leningrad, F/VF (Image)

1955, North Pole-Moscow Flight, red overprint on 1r multicolored, block of four, top right stamp without a dash variety, while top left one with wide space between ‘‘Sev.’’ and ‘‘Polyus’’, full OG, NH, VF (Image)

Collection. 1923-37, 73 mint stamps and 1 souvenir sheet, including never hinged Air Post Conference, Zeppelin set with perforation 12½, Ice- Breaker ‘‘Malygin’’ imperforated set, Stratosphere Disaster, Aviation Exhibition set and souvenir sheet, fresh quality overall, mainly full OG (several stamps are regummed), mostly VF, SC.v. almost 270,000P, stamps with private perforation 11 are not counted (Image)