Russia
Peter III Rouble 1762 CПБ HК XF45 PCGS, St. Petersburg mint, KM-C47.2, Dav-1682, Bitkin-11, Diakov-7. An extremely short-reigning emperor, Peter III was never fully accepted by the Russian citizenry before being assassinated after only 6 months on the throne, a plot possibly led by his wife and popular successor, Catherine II the Great.
Estimate: 2000-2500 USD