Crowned four-sectioned shield surrounded by legend.
Obverse script
Latin
Obverse lettering
SIG ·
III · DG · REX · POL · M · D · L · (Translation: Sigismund III Dei Gratia Rex Polonia Magnus Dux Livoniae Sigismund III Vasa, with God`s grace, King of Poland and great Duke of Livonia)
Reverse description
Cross on orb containing value, above crossed keys, and separating date, all surrounded by legend.
Reverse script
Latin
Reverse lettering
GROS · ARGE - N · CIVI · RIG ·
1 - 6
Z4 (Translation: Grossus Argentea Civitatis Rigensis Silver Grossus of the city of Riga)