Piasts, Boleslaw II the Bold (1058-1080), denarius - prince on horseback with a spear
obverse: figure of a prince on horseback holding a spear, behind the figure of the prince a mint mark (most likely a lying letter S)
reverse: the duke's head in a smaller pearl surround and the legend BOLEZLAUS and the outer pearl surround
silver, weight 0.80 grams, diameter 14.4 mm