Horseman advancing right, brandishing a sable / Inscription in three lines "TSAR I VELIKIY KNYAZ DMITRY IVANOVICH VSEYA RUSI" ("Tsar and Grand Duke Dmitry Ivanovich of All Russia"). 10mmx15mm, 0.66 grams. Pskov mint, minted 1605-1606. Griszin #245.
False Dmitriy I was the Tsar of Russia from 21 July 1605 until his death on 17 May 1606 under the name of Dimitriy Ioannovich (Cyrillic ДимитÑий Иоаннович). He is sometimes referred to under the title of Dmitriy I. He was one of three impostors (Russian: самозванец 'samozvanets', "imposter") who claimed during the Time of Troubles to be the youngest son of Ivan the Terrible, tsarevitch Dmitriy Ivanovich, who had supposedly escaped a 1591 assassination attempt. It is generally believed that the real Dmitriy was assassinated in Uglich and that this False Dmitriy's real name was Grigory Otrepyev, although this is far from certain.