A circulating, readable piece, binding mark on the rim.
Interesting denomination and larger than ortho diameter further add to the charm and attractiveness.
Sheet metal defects typical of this issue.
Obverse: the city coat of arms supported by two lions, above it the denomination 30 GR, under the console the date 1762, in the rim the legend:
MON.ARGENT.CIVIT.GEDANENS;
Reverse: bust of the ruler in crown, armor and cloak, to the right, in the rim legend:
D.G.AVGVST.III.R.POL.M.D.L.[];