1932, Airship over the Dnieper Dam, 15k gray black, engraved printing, perforation 12 1/2, complete sheet of 40 (5x8), perfect condition, full OG. NH, VF, C.v. $480++, Est. $400-$450

400.00

1932, Airship over the Dnieper Dam, two stamps of 15k gray black, perforation 10 1/2 and 14 respectively, first one neatly cancelled, the other one with OG, both are VF, Est. $100-$120

100.00

1935, Moscow - San Francisco Flight, red surcharge 1r on 10k dark brown, position 22 of 25-stamp setting, full OG, hinged, VF, light Soviet Philatelic guarantee hs, C.v. $500, Est. $300-$325

300.00

1961, Helicopter over Kremlin, black surcharge 6k on 60k ultramarine, right sheet margin horizontal pair, right stamp has no "6" in surcharge variety, full OG, NH, VF and rare positional item, Est. $1,500-$1,800