Trojak koronny - Stefan Batory Poznań mint

Stefan Batory's trojaks were struck at Poznań during a period when the Polish crown mints were under intense pressure to produce small silver for daily commerce — the denomination had been introduced decades earlier specifically to fill the gap between large thalers and near-worthless base metal. The Poznań facility operated under lease arrangements common to the period, where mint masters paid the crown for the right to strike and profited from the difference between bullion cost and face value, an incentive structure that occasionally produced coins of inconsistent fineness.

The 1584–1585 dating corresponds to the final years of Batory's reign before his death in December 1586, after which the Poznań mint's output dropped sharply pending the interregnum.