Vietnam Gia Long 50mm Annam cash coin ID HELP.

I’d greatly appreciate help with an ID on this copper/zinc cash coin. Denomination? It doesn’t seem to match anything in my Krause manual.
Diameter 50mm, weight 28.38g

thanks,
RM

 

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Any thoughts on this coin? It is from 1802-1820.

 

Looks Chinese.
Maybe CHAI-CH'ING, AD 1796-1820
https://www.calgarycoin.com/reference/china/china8.htm

 

I think you have a Vietnam war era charm or amulet made to look old and to be sold as a souvenir to service men (to bring home on their return to the states).They sold for a couple of dollars .They incorporated old coin legends and proverbs .I think there were numerous varieties.