Denier Bracteate guziczkowy - unknown Prince Płock mint

Bracteates of this type — struck on a single thin flan so that the design reads in relief on one side and as an incuse ghost on the other — were the dominant small-denomination coinage of the Polish duchies during the fragmentation period, when Masovia remained politically separate from the reunifying Piast territories under Władysław I. The attribution to Płock is grounded in the mint's documented activity under the Masovian line, though the specific prince responsible for this emission cannot be identified with certainty, reflecting the broader archival gaps in Masovian numismatic records of the early fourteenth century.