Looking at the photo more closely it sort of resembles a William and Mary. I don't know why but, there are a few things that make me think it's a William and Mary

This is the photo I compared your coin to:
View attachment 1412109
The thing that jumped out at me in the beginning was the two lines at the top of the coin. It could also be the "ET" in the wording "Gvlielmvs et Maria"
I also noticed the shape of what appears to be a head on the coin, with the lines which could be hair ties, which closely resembles a William and Mary.
Lastly I noticed the last 2 letters on your coin, which appear to be "IA" as in "Maria"
This is just what I noticed.
I don't know if it is or isn't a W&M but what ever it is, it's pretty cool!