The coin world's answer to Damien Hirst's art sale at Sotheby's is set to take place on November 6, when a rare 1755 Russian 20-rouble gold coin goes up for auction at London's Cavendish Hotel.
The coin was once owned by Grand Duke Georgii Mikhailovich, a 19th century member of the Russian royal family. It is being sold by St James's Auctions, in association with coin dealer AH Baldwin & Sons.