Denier Bracteate - Bolesław Mieszkowic or Leszek of Masovia Kruszwica or Inowrocław or Płock mint

The bracteate denier — a single-sided hammered thin flan — became the dominant coinage of fragmented Piast Poland following the Statute of Bolesław III Krzywousty in 1138, which deliberately partitioned the kingdom among his sons and triggered over a century of dynastic subdivision. The resulting proliferation of competing mints across Kuyavia, Masovia, and Greater Poland makes precise attribution of thin-flan issues from this period genuinely difficult; Kop#190 sits in that contested zone where documentary silence forces attribution by die study rather than chronicle.

The uncertainty between Bolesław Mieszkowic and Leszek reflects real historiographic disagreement, not catalog hedging.