1924 Postage Due Stamps, Soviet Union USSR (Different Issues) (Image)

1932-33 15k Philatelic Exchange Tax Stamp, Soviet Union USSR ( 'Dropped' '???', Print Error, MNH) (Image)

1932-33 25k Philatelic Exchange Tax Stamp, Soviet Union USSR (Missed Dot after 'C', Broken 'K', Print Error, MNH) (Image)

1932-33 Philatelic Exchange Tax Stamps, Soviet Union USSR (Print Errors) (Image)

1936 40k Imperf Definitive Issue, Soviet Union, USSR (Zv. 448b, CV $350) (Image)

1937 20k Definitive Issue, Soviet Union, USSR (Imperf, Zv. 470a, CV $750) (Image)

1939 30k Imperf Definitive Issue, Soviet Union, USSR (Zv. 580b, CV $750) (Image)

1925 Gold Definitive Issue, Soviet Union USSR (Typography, with Watermark, Full Set, MNH, 5r MLH) (Image)

1924 Lenin's Death, Soviet Union USSR (SHIFTED Narrow and Wide Red Frame, Print Errors) (Image)

1926-27 10k Post-Charitable Issue, Soviet Union USSR (White Dot on Star, Print Error, MNH) (Image)

1927 15k Airpost Conference, Soviet Union USSR (Spot above 'A' in '????', Print Error) (Image)

1931 20k Airship Constructing, Soviet Union USSR (Broken 'T', Print Error) (Image)

1931 20k Airship Constructing, Soviet Union USSR ('Hole in the Mausoleum', Print Error) (Image)

1931-32 1r Definitive Issue, Soviet Union USSR (without Background, Print Error, MNH) (Image)

1936 1k Pioneers Help to the Post, Soviet Union USSR (Stroke to the Right of '1', Print Error, Canceled) (Image)

1936 5k Pioneers Help to the Post, Soviet Union USSR (Red Dot, Print Errors) (Image)

1936 15k Pioneers Help to the Post, Soviet Union USSR (Long Dark Stripe, Print Error) (Image)

1937-41 50k Definitive Issue, Soviet Union USSR (MISSED Hatching, Print Error, MNH) (Image)

1938 1r The 20th Anniversary of the Red Army, Soviet Union USSR (Ordinary Paper) (Image)

1939 60k The 50th Anniversary of the Saltykov Death, Soviet Union USSR ('00' instead '60', Print Error, CV $70) (Image)

1939-40 5k Definitive Issue, Soviet Union USSR (Dot near the Fase, Print Error) (Image)

1943 15k 25th Anniversary of the October Revolution, Soviet Union USSR (White Stroke between '1' and '5', Print Error) (Image)

1944 1r The 100th Anniversary of the Birth of I. Repin, Soviet Union USSR (White Spot under 'CCCP', Print Error, CV $30) (Image)

1944 20k Awards of the USSR, Soviet Union USSR (Short Rays, Print Error) (Image)

1944 20k Awards of the USSR, Soviet Union USSR (Broken Ribbon under 'O', Print Error) (Image)