Coin

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have such a coin, I am looking for information about it

Hi,
it's one of the 42 subtypes of this coin:
https://en.numista.com/catalogue/pieces1133.html

https://en.numista.com/forum/topic71935.html, please read this. At least you supplied images.

Looks of the Shan-Lung general type, mint Boo Ciowan (Board of Revenue)

https://www.calgarycoin.com/reference/china/china8.htm#chien%20lung

Yes, for future attribution requests it would help to post the diameter and weight.

As far as value there were millions made and examples are easy to find. It has almost no numismatic value unless it is in great shape (which you coin isn't) or is one of the rare subtypes (and you coin is so warn that it is hard to determine the subtype).