A very 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 legend GR-OS, 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, in the rim the legend with punctuation in the form of diamonds:
STEP:D:G:REX-PO:D:L○;
