RRR-, Casimir the Great, 1360-1382, Pullo, Lviv, R7

A very rare puło, whose rarity is estimated by Shlapinskiy at R7, and by Kopicki, referring only to Czapski's collection, at R8. Deep minting, even, strong, patina.
Ruthenian coins were the first Polish copper coins minted by Casimir the Great, Władysław Opolczyk and Ludwik Andegawensky, and until 1650 they remained the only money minted in copper in the Polish lands.