Goznak Die Proofs. 1982, definitive issue, Kremlin Tower, die proof of 45k in brown, size 100x120mm, printed on wove paper without gum, VF and very rare, Est. $500-$600 (Image)

Goznak Die Proofs. 1983, 200th Anniversary of the birth of Simon Bolivar, sunken proof of the central engraved design of (6k) in black, artist A. Tolkachev, size 120x94mm, printed on stamp gummed paper, traces of hinges, still VF and rare, Est. $400-$500 (Image)