Russia
Catherine II Rouble 1786 CПБ-ЯA, St. Petersburg mint, Bitkin-242, Diakov-528 (R1), MS63 NGC. Obv. Crowned portrait right. Rev. Crowned double-headed Imperial eagle with date and value. Fully lustrous, with a touch of golden patina and a flan flaw at 7 o'clock. Rare in this condition. A similar coin, without the flan flaw, sold for $22,000 in a January 2008 New York auction.
Estimate: 7000-9000 USD