1887, pre-printed cover of "Airship the Construction Department. Russia" (The Head of the Department was Prof. Dmitry I. Mendeleyev, creator of the Periodic Law of Elements), the item franked by 7kblue and sent from St. Petersburg to Berlin, addressed to Hermann Moedebeck, Aeronautics Pioneer, specialist in air navigation, the cover has all appropriate markings, VF, a rarity the dawn of aviation, Est. $3,000- $4,000

1923, red Airplane overprint on 45r green and black in vertical pair together with 28 other RSFSR adhesives and two exchange tax stamps used on registered cover from Moscow to US, all appropriate markings and NYC arrival ds, minor wearing, still F/VF and rare mailing, Est. $300- $400

200.00

1928, two Soviet Trade Mission in Germany pre-printed flown covers from Berlin to Moscow, beautiful German machine postage imprint, appropriate Air Post labels and arrival ds on reverse, placed on the Collection page, mostly VF, ex-V. Ustinovsky, Est. $150-$200

100.00

1931, Airship over the Arctic Region, 50k dark brown, comb perforation 10 1/2x12, right sheet margin single with double impression of the design, nice and post office fresh, full OG, NH, VF and very rare, only a handful of this rarity is known, this one is definitely the best preserved example, authenticity is guaranteed, Est. $3,000-$4,000

1931, Airship over the Arctic Region, perforated (10 3/4) trial color proof of 50k in dark brownish violet on paper with horizontal watermark Borders and Rosettes, removed from a presentation card with text "Project" at the bottom, VF and extremely rare item. Only 48 imperforated proofs in brownish violet color were produced, perforated proofs of this stamp were not offered to the market, V. Zagorsky certificate, Est. $9,000-$12,000

1932, Airship over the Dnieper Dam, 15k gray black, engraved printing, perforation 10 1/2, very well centered with intact perforation, full OG, LH, VF and scarce stamp in sound condition, C.v. $2,000, Est. $1,000-$1,500

750.00

1933, Stratostat USSR-1, 5k, 10k and 20k, complete set of three, full OG, NH, VF, C.v. $463, Est. $250-$300

150.00

1934, Civil Aviation, trial color imperforated proof of 5k in brown with pale brown background, printed on watermarked Borders and Rosettes paper, full OG, NH, VF, Est. $800-$1,000

500.00

1934, Civil Aviation, 80k purple, a single with perforation 10x13¾ x13¾ x 13¾ , printed on watermarked Borders and Rosettes paper, rough perforation at top as typical for these errors, neat Moscow CTO with full OG, VF and rare, N. Mandrovski certificate, Est. $1,500-$2,000

1935, Moscow - San Francisco Flight, red surcharge 1r on 10k dark brown, small "f" in San Francisco variety (position 7), large part of OG (gum lost at bottom left corner), VF, Soviet Philatelic guarantee hs, V. Zagorsky certificate, C.v. $1,500, Est. $700-$800

400.00

1955, Moscow - North Pole Flight, red overprints on 1r and 2r, complete set of two, each one without dash variety, full OG, NH, VF, Est. $300-$400

200.00