Watch List notes:

The Oksana Bennett Collection of Russian Coins | Alexander I Pávlovich (1801-1825), 20-Kopeks, 1819-CNB, St. Petersburg, Paul Stupitzin, incuse edge grained, 4.30g, 12h (Sev. 2766; Uzd. 1454; Diakov 254; Bitkin 199), harshly cleaned, otherwise a bold very fine, very rare

provenance
Gorny and Mosch 167, 19 March 2008, lot 5517