This coin I didn't find neither under France Kingdom nor Feudal, so here it is, but the quality is not very good:
weight 5.60 grs, diameter 26.16 mm, thickness 1.26 mm, alloy 0.917 silver, King Louis XV, the mint mark is "9" at 18:00 on the year side (not really visible) and the engraver's mark a right walking duckling (just before the date)
Ole