A beautiful piece. Mint. With mirror.
An issue from a transitional period: after Reysner's flight, but before the introduction of the letter L.
Distinctive due to the absence of the coat of arms and initials of the treasurer Firlej and any mint marks (which can also be observed on the 1598 grosz erroneously attributed to Poznan - more at SpodStempla.pl).
Variant with a small bust, with a narrow wavy orifice.