½ Groat
(1546–1569)
półgrosz
Billon (.375 silver) (Fineness decreased to 0.344 in 1558)
1.25g
ø 20mm
½ Groat - Sigismund II Augustus
(1533–1569)
Wilno mint
Billon (.375 silver) (0.344 from 1558)
1.35g
ø 20mm