1927-28 5k The 10th Anniversary of October Revolution 1917, USSR (IMPERFORATE, Thick Cardboard Paper, Zv. 214d I, CV $4,000, MNH) (Image)

1932 15k The 40th Anniversary of M. Gorkys Literary Activity, Soviet Union USSR (Imperforate, Zv. 302a, MNH) (Image)

1935 4k Issued in Memory of Bauman, Soviet Union USSR (Imperforate, Zv. 437b, MNH) (Image)

1938 80k the Soviet Drift Station `North Pole-1`, Soviet Union USSR (Imperforate, Zv. 502a) (Image)

1923 2r Agricultural and Craftsmanship Exhibition, Soviet Union USSR (SHIFTED Perforation, Print Error) (Image)

1923 2r Agricultural and Craftsmanship Exhibition, Soviet Union USSR (MISSED Perforation, Print Error, MNH) (Image)

1924 3k Lenin's Death, Soviet Union USSR (Zv. 23, Narrow Red Frame, CV $1,250) (Image)

1924 6k Lenin's Death, Soviet Union USSR (Zv. 24, Narrow Red Frame) (Image)

1924 12k Lenin's Death, Soviet Union USSR (Zv. 25, Narrow Red Frame) (Image)

1924 20k Lenin's Death, Soviet Union USSR (Zv. 26, Narrow Red Frame, CV $225) (Image)

1924 6k Lenin's Death, Soviet Union USSR (Strongly SHIFTED Red Frame, Print Error) (Image)

1924 3k Lenin's Death, Soviet Union USSR ('Hairy Lenin', 'Forelock', Print Error, MNH) (Image)

1926 14k International Proletarian Esperanto Congress, Soviet Union USSR (Perf. 11.5, Zv. 154A, Certificate, CV $3,500) (Image)

1927 Esperanto, Soviet Union USSR, Block of Four (Perforation ERROR on Corner Margin, No Watermark, Full Set) (Image)

1927-28 Definitive Issue, Soviet Union USSR (INVERTED '8', Zv. 167a + 167, Pair, Canceled, CV $250) (Image)

1927 8k/7k Definitive Issue, Soviet Union USSR (INVERTED '8', Print Error, CV $180) (Image)

1927 10k The First International Airpost Conference, Soviet Union USSR (UNPRINTED '7', Zv. 196a, Print Error, CV $500, MNH) (Image)

1931 50k Airship Constructing Zeppelin, Soviet Union USSR (Dark Blue, Aspidka, Zv. 279, CV $1,300, MNH) (Image)

1935 USSR Moscow - San-Francisco Flight Levanevskiy (Oval Dot after '???.', Zv. 424c, CV $900-1,800, Certificate, Signed) (Image)

1935 USSR Moscow - San-Francisco Flight Levanevskiy (Oval Dot after '???.', Zv. 424c, CV $900-1,800, Certificate, Signed) (Image)

1935 USSR Moscow - San-Francisco Flight Levanevskiy on Cut (Raised Dot after '???' + Flooded '?', Zv. 424ba, CV $1,100, Certificate) (Image)

1936 10k Definitive Issue, Soviet Union USSR (Perf 12.25, MISSED Perforation, Print Error) (Image)

1939 15k Definitive Issue, Soviet Union USSR (OVERINKED Green, Print Error, MNH) (Image)