A very nice piece, well struck.
Variety without the D G in the obverse legend.
Obverse: in the pearl rim crowned monogram SA, on its sides the date 15-63, in the outer rim the legend punctuated by triplets and the Axe mark of Gabriel Tarla administrator of the Vilnius mint:
SIGIS AVG REX-PO M D LITVA;
Reverse: in the pearl rim a crowned decorative shield with the Pogo to the left and the denomination mark III, in the outer rim a legend punctuated by trifoli:
GROSS AR TRIP MAG DVCA L;