Półtorak / 3 Polker - Jan II Kazimierz Waza Poznań mint

The 1662 półtorak arrives near the end of a coinage type that had already been thoroughly debased over decades — by the 1660s these small silver pieces contained a fraction of the silver their early 17th-century predecessors carried. Jan II Kazimierz's reign was consumed by the catastrophic wars collectively known as the "Deluge": Swedish invasion, Muscovite incursions, Cossack uprisings, and Brandenburg opportunism all simultaneously. The treasury was gutted, and the mint at Poznań was kept running largely to fund military obligations rather than serve any coherent monetary policy.

Jan Kazimierz abdicated in 1668, the only Polish king to do so voluntarily, citing exhaustion with a kingdom he famously described as ungovernable.