1923, Airplane ''Fokker F111'', 1r-10r, unissued complete set of four in horizontal or vertical (10r) strips of three, full OG, NH, VF (Image)

1923, Fokker F-111, 5r green, wide ''5'' variety, printed on ordinary paper, tiny natural paper inclusion at the bottom, exceptional condition without usual gum creases, full OG, NH, VF and extremely rare, the only a few never hinged stamps are known of 50 printed (25 on thin and 25 on ordinary paper), expertized by R. Calves and others, Raritan Stamps guarantee, C.v. $40,000 as hinged (Image)

1924, black surcharge 10k on ''Fokker F111'' 5r green, basic stamp with wide ''5'' variety, very nice stamp without usual gum creases, full OG, NH, VF, C.v. $2,250 (Image)

1924, black surcharge 10k (narrow ''0'' variety – position 12) on ''Fokker F111'' 5r green, basic stamp with wide ''5'', a beautiful stamp with full OG, light trace of hinge, VF and very rare, only one stamp has this variety in 25-stamp setting (Image)

1930, Zeppelin issue, 40k ultramarine and 80k carmine, imperforated complete set of two, with margins at left or right respectively, excellent condition, full OG, NH, VF, each stamp with Soviet guarantee hs on reverse, C.v. $5,700 (Image)

1931-32, Airships, 10k-1r, imperforated and perforated sets of five and 15k gray, engraved printing, nice centering and fresh colors, full OG, mainly LH, VF, C.v. $361 (Image)

1931, Airship over the Arctic Region, 50k dark gray blue, error of color, mathematically well-centered with intact perforation and post office fresh, full OG,, NH, VF, C.v. $900 (Image)

1931, Airship over the Arctic Region, 50k dark gray blue, error of color, intact perforation, full original with minor disturbance at bottom, NH, F/VF centering (Image)

1931, Airship over the Arctic Region, 50k dark gray blue, error of color, nicely centered single with very unusual variety – additional mirrored impression on the face (especially at top), bottom perforation separated by scissor's, full OG, NH, VF, C.v. $900++ (Image)

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

1932, Airship over the Dnieper Dam, 15k gray black, engraved printing, perforation 10½, expertly repaired small thin at top, guaranteed unused, regummed, F/VF appearance of this rare perforation variety (Image)

1931, Ice-Breaker ''Malygin'' 30k-2r, imperforated and perforated (comb 12x12½) complete sets of four, full OG, LH or previously hinged, VF, C.v. $369 (Image)

1932, Ice-Breaker ''Malygin'', complete set of four with comb perforation 12x12½ used on flown cover from Moscow to Germany, tied by Moscow ''7.3.33'' date stamp, red Berlin Luftpostamt and Neumarkt ''9.3.33'' arrival markings, minor stamp perforation soiling, still F/VF (Image)

1932, International Polar Year, 50k carmine (perf 12), 1r green (perf 10½), complete set of two, nicely centered, full OG, NH, VF, C.v. $225 (Image)

1933, Stratostat ''USSR 1'', 5k-20k, complete set of three, nicely centered, full OG, previously hinged, VF, C.v. $310 (Image)

1934, Stratostat ''USSR 1'', 20k violet, top sheet margin horizontal pair used on registered cover from Leningrad to Finland, tied by ''9.7.34'' ds, appropriate markings, no backstamp as often for correspondences to Finland, mostly VF (Image)

1934, Civil Aviation, 5k-80k, complete set of five printed on paper without watermark, full OG, LH or previously hinged, VF, C.v. $403 (Image)

1934, 10k green, horizontal pair printed on paper without watermark, imperforated between stamps, CTO with full OG (VLH), VF, C.v. $1,250 (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 rare set of the Postal Archives, ex-Vadim Ustinovsky (Image)

1934, Airships, 5k-30k, complete set of five, premium centering and intact perforation, full OG, previously hinged, VF , C.v. $517 (Image)

1935, Chelyuskin Rescue, 1k-50k, complete set of ten, fresh colors and intact perforation, full OG, LH or previously hinged, VF, C.v. $1,032 (Image)

1935, Chelyuskin Rescue, Hero of the USSR Ivan Doronin, enlarged black- and-white photo essay of 20k, size 26.5x45mm instead of 25.5x42.5 mm, strong picture details, which are slightly different from details of issued stamp, no gum as produced, VF and scarce, the essay is scanned together with issued stamp for comparison, this stamp is not included in the lot (Image)

1935, Chelyuskin Rescue, Hero of the USSR Nikolai Kamanin, 40k purple, variety – horizontal instead of vertical position of watermark Borders and Rosettes, full OG, LH, mostly VF and rather scarce watermark variety (Image)

1935, Chelyuskin Rescue, Camp of the Expedition, 50k dark ultra, two stamps with horizontal or vertical positions of watermark Borders and Rosettes, full OG, NH, VF (Image)

1935, Moscow – San Francisco Flight, red surcharge 1r on 10k dark brown, position 5 of 25-stamp setting, full original gum with minor disturbance at right, NH, VF, Soviet Philatelic and several other hs on reverse, C.v. $1,275 (Image)