Nicely reflected heads of the ruler, which is not common for these coins.
Variety with lying "S" and "z" in the field.
The name of the ruler in the correct writing - BOLEZLAVS.
The first type of coins of Boleslaw the Shoddy. His princely denarius from the mint in Cracow, dated 1070-1076.
Silver, diameter 14.0 mm, weight 0.84 g.