Watch List notes:

The Oksana Bennett Collection of Russian Coins | Alexander II Nikolaevich (1855-1881), 5-Kopeks, 1866-EM, Ekaterinburg, crowned double-headed eagle, rev. value and date, edge plain, 12h (Brekke 227; Uzd. 3662; Diakov 246; Bitkin 315), practically as struck, in NGC holder, graded MS64 BN (Cert. 4153322-006)

provenance
New York Sale XXXI, 10 January 2013, lot 1287