A very nice piece.
Obverse: bust of the king to the left, in the rim legend:
LUD-XVI-D-G-FR-ET NAV-REX-;
Reverse: crowned shield of the coat of arms with French lilies, under it a laurel wreath, in the rim legend:
SIT-NOMEN DOMINI Q BENEDICTUM-1789-;
Rant: DOMINE SALVUM FAC REGEM
Diameter 41 mm ,weight 29,4 g.