The NOTOS 2021 European Philatelic Exhibition was held on November 19–22, 2021, in Athens, Greece, and was included in the state program of events to commemorate the 200th Anniversary of the Greek War of Independence. Collectors from 33 countries took part in the exhibition.
JSC Marka was awarded the Big Silver Medal in the literary competition class for Catalog State Valuable Postal Matter. Postage stamps of the Russian Empire 1857-1919. Postage stamps of the RSFSR 1918-1923. Postage stamps of the USSR 1923-1960 (reissue, electronic version). The same award was granted for Catalogue State Valuable Postal Matter of the Russian Federation 2018-2020.
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