Russia
Elizabeth Poltina (1/2 Rouble) 1755 CПБ-IM, St. Petersburg mint, Bitkin-326 (R2), Diakov-342 (R2), Petrov (5 Rub), AU58 NGC. Obv. Crowned and draped bust right. Rev. Crowned double-headed Imperial eagle with date and value. Lustrous, with light golden toning. No significant marks are noted, but close examination reveals a small, barely noticeable, obverse flan flaws. An extremely rare type, with the example the only piece certified, in all grades, by NGC.
Estimate: 9000-11000 USD