Unusual 1891 coin

Hey I found this coin. Wondering if its legit or fake and what it might be worth. Can anyone identify?

 

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Your alignment is not correct try 1681. I am able to read Carolus. It is most likely a Reale.

 

Mexico 8 Reales, Charles II
https://en.numista.com/catalogue/pieces317105.html

I'm not sure if it's genuine or not. It's supposed to weigh 27.64 grams.

 

It’s upside down and the real date is 1681.

 

Good call Mr. Numis.
@Lyricfive can you provide a weight.

 

Where did you find it?

 

I'm no expert, certainly not on old Spanish coins, but it looks like a crude fake to me.

 

Maybe some kind of game piece, fake treasure.

 

Can we see the rim of the coin? I'd say counterfeit, however.