The coin weighs 4 grams, it is not magnetic. I believe it is about 23 mm in diameter, maybe 1.57 mm in thickness.
At some point, the container it was in said: Ch'ien-Lung T'whg-pao and indicated 1731-1795.
Can someone identify what this coin is in Numista?


https://en.numista.com/catalogue/pieces44919.html
