24mm diameter with 7mmx7mm square center hole

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I don't recall where i got it but i have traveled to Hong Kong, Taiwan, S.Korea and Japan.
Similar to this ...
https://en.numista.com/catalogue/pieces6817.html
ZacUK is right, it's a Guangzhou Cash but since there are two varieties of this coin you should perform a fast weight to know the exact type.

I weighed them and 2 are 3.0 grams and the other 3 are 2.70, 2.77 and 2.79 grams.

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