Lenin, Stock of Postcards, Soviet Union, USSR (Image)

1926 Post-Charitable Issue, Soviet Union, USSR (Image)

1929 14k Definitive Issue, Soviet Union, USSR (Perforation 10.5, Canceled) (Image)

1929-32 1k Definitive Issue, Soviet Union, USSR (Perforation 10.5, Canceled) (Image)

1931 Airship Constructing in USSR, Soviet Union, USSR (Zv. 275 A, 277 A, Perf 10.75x12, Canceled, CV $30) (Image)

1932-33 15k M.Gorky, Soviet Union, USSR (Zv. 302 a, Imperforated, Canceled, CV $150) (Image)

1939 30k Definitive Set, Soviet Union, USSR (Watermark, no Watermark, Canceled, CV $40) (Image)

1937 The All-Union Pushkin Fair, Soviet Union, USSR, Souvenir Sheet (Cancellation) (Image)

1990 Nobel Prize Winners, Soviet Union, USSR (Black Proof, MNH) (Image)

Banknotes from Soviet Union, USSR (Image)

1997 A. S. Marmornov, V. A. Pantyukhin, Catalog of The Postal and Advertising Stamps-Stickers, Moscow (28 pages) (Image)

2010 V. B. Zagorsky, Catalog of Postage Stamps with Missing Perforation, Soviet Union 1923-1991 (59 pages) (Image)

2016 Soviet Clandestine Mail Surveillance, 1917-1991, by David M. Skipton and Steve Volis, Published by The Collectors Club of Chicago (554 pages) (Image)

1999 V. B. Zagorsky USSR Specialized Catalog of Postage Stamps 1923-1940, Standard - Collection, Saint Petersburg (Image)