Watch List notes:

The Oksana Bennett Collection of Russian Coins | Siberia, Catherine II 'Velikaya' (1762-1796), 5-Kopeks, Kolyvan (2), 5-Kopeks, 1775-KM, edge obliquely grained, 31.53g, 12h (Brekke 476; Uzd. 4317; Diakov 335; Bitkin 1076), staining spot, otherwise a bolder very fine; another, 1776-KM, edge obliquely grained, 36.24g, 12h (Brekke 478; Uzd. 4323; Diakov 349; Bitkin 1078), about very fine

provenance
ii) Stack's Coin Galleries, 28 April 2010, lot 1457