Unknown old coin for identification [solved]

Hi everyone!

You can see the pic of the coin I attached. Actually my grandmother found it during gardening. She lives in the western part of Hungary. Only this side of the coin is still unhurt. in the middle you can see a round chain. I could not find anything to identify this coin. I hope you can help us!

Thank you
Vilmos

What is the diameter?

The diameter is 30 mm.

Maybe it is 30mm diameter, then if so it is this, from Hungary >
https://en.numista.com/catalogue/exonumia284403.html

'Lánchíd bárca (Chain Bridge token)
Those who intended to cross the Chain Bridge were given a token in exchange for cash, which was then handed over on the other side, proving that the amount demanded had indeed been paid at a customs house on the other bank'.

Thank you for your help!
I really appreciate it!

I see you wrote a reply, confirming size, while I was replying.
My link has pictures in a catalogue, and here is another reply >
https://en.numista.com/forum/topic80704.html#p689802

Different numbers on them.
1
2
3
3.1/2
4
8
Not sure what yours has.

I think it is a number 8 or 3. I can’t clearly see it.