Losnummer 31306. Nicholas I copper Proof Pattern 3 Kopecks 1840-CПБ PR63 Brown NGC, St. Petersburg mint, Bitkin-929 (R2), Brekke-206 (Very Rare), UZD-3308. Obv. Crowned Nicholas I monogram. Rev. Date, value, and mintmark. Flawless strike, with slightly mottled brown patina. The surfaces are essentially free of marks, with traces of luster and reflective fields beneath the toning. An exceptional example of the grade Proof 63, and we think a bit undergraded. Very rare and the only example of this very rare Pattern issue certified by NGC.