Trojak / 3 Grosze - Sigismund III Vasa Poznań, P mint mark

The Poznań mint operated under lease during this period, with the city's municipal council holding production rights that created persistent tension with the royal treasury over quality control. Trojaks from this mint are frequently found with inconsistent alloy adherence — not as a known die fault, but as a documented consequence of the lease system, where profit incentives cut against strict silver content compliance. The "P" mark on these pieces is the only guarantee of Poznań origin; attribution otherwise relies on die study.