Northern Poland, I think.
In the General/Chat forum, on a thread titled Late Bronze Age treasure found in the field near Chojnice, onedoug wrote:
Northern Poland, I think.
It’s in the area where one the the three Polish distinct slavic dialect lingusitic groups the Kashubes which comprize Poland (people of the sea) lived. That included btw Stettin which for a time was controlled by Sweden and extended into the Mecklinberg peninsula. Sounds like that site is in that province known as Kashube along the Baltic sea coast. Masuri,(people of the rivers) Polany (people of the fields)are are the other .