Fake polish coin? [solved]

Hi guys, I bought this coin, common of course, and cheap (3,5€). But the material does not seems silver and looks like a forgery, cheap, of course. What do you think?

Good evening.
No problem with me, naturally.
It is always better to state the weight and size, and here the thickness is decisive for these. Because it is large it weighs little and is therefore extremely thin .
For me, this is what the silver in a coin that was soaked in thinner looks like.
just look -on the coin letters natural and so in my opinion real.
Ivan

Thank you, Ivan. Have a good rest of the night.

It is fine.
Very low grade silver.
https://en.numista.com/catalogue/pieces136366.html

Thank you, tdziemia. Polish coins even the cheaper ones have something so interesting. Have a good night.