Poland. Boleslaw IV Kedzierzawy (Boleslaus IV The Curly) 1146-1173. Denar ca. 1157-1166, Crakow, Obv.: Emperor Frederick Barbarossa seated on the throne, Rev.: Inscription BOL / EZL / AVS in three lines separated by lines, Frynas P.8.4 R, Gum-H. 89, Kopicki 58 R5, Silver 16,2 mm, weight 0,42 g., Condition NGC MS 64, slightly toned, Beautiful, rare in this grade!