Denier - Bretislaus I

Bretislav I consolidated Bohemian territory aggressively during his reign, briefly seizing Silesia, Moravia, and much of Poland in the early 1030s — campaigns that required substantial military financing and likely drove the volume of his minting activity. His coinage circulated across a politically unstable region where borders shifted with each campaign season.

Cach 310 is among the more consistently documented types of his output, though die-link studies remain incomplete and attribution of individual specimens sometimes relies on provenance as much as typology.