Денарий, Польша, Bolesław II the Bold (1058-1080)

POLAND / Boleslaw the Bold 1058-1080. royal denarius, Obv: Bust wearing a crown and holding a sword to the left, Z behind it, Rev: Gate with three towers ended with balls, silver 0.76 g, Gum.H. 71, Gum.P. 48, Kop. 27 (R4), P. 32, Such. IX/2, very nice and rare