I have this Belgian States (Austrian Netherlands) coin from 1771. It appears to be a 1/2 Kronenthaler based on the inscriptions. However, the size and weight do not match the KM #19.
The diameter should be 35 mm with a weight of 14.72 g.
Mine has a diameter of 33 mm and a weight of 13.6 g. The damage on the front also looks strange since it almost appears as if it is a plated coin and the silver has peeled off in various places.
Is this an old well worn forgery or something else?

