Hi!
This little coin is 0.14g and has 13mm diameter.
It seems that there are 3 towers, I assume that the design of the city walls.
I found a kind like similar coin from the city of Cologne. There are 3 towers as well but I can see that they are in one line however mine middle tower is higher than two others. I wonder if I have a hunch here. Maybe someone could advise on this?
https://en.numista.com/433252