A nice piece.
Well preserved details.
Obverse: denomination III between stars, below it the coat of arms of Riga, separating the dates 15-84 and the beginning of the GR-OS legend, below it further 3 lines of the legend:
ARG:TRIP/CIVI:RI/○GE○;
Reverse: crowned royal bust with numerous jewels in the rim of the crown, wearing plate armor, to the right, surrounded by the legend:
STEP:D:G:REX-PO:D:L-;
