A very rare, first Polish coin with a coin value marking - DENARIVS.
A nicely patinated piece.
Recommended.
obverse: in the rim a prince in majesty, holding a sword and a hand in a gesture of greeting, in the outer rim a legend (+DVCIS BOLEZLA)
reverse: in the rim a cross, between its arms balls and orbs, in the outer rim a legend (+DENARIVS)