Денарий, Польша, Bolesław I the Brave (992-1025)

POLAND. Bolesław Chrobry 992-1025, denarius, Obv: A straight cross with four balls in a field, around the inscription (K)OTISLA(VS), Rev: A straight cross with four balls in a field, around the inscription (BOLIS)LAVS, Stronczyński 16, WN 1967 (z.40-41), St. Suchodolski - Polish coin in the 10th/11th century, type VIII, p. 108, silver 1.21 g, extremely rare, known so far in five copies (2 pieces in the Museum in Krakow and 3 pieces in the Museum in Berlin), perhaps it is the only one known copy in private hands