Found strange coin metal detecting old site.

[Dirtfisher707]

It has a 9/10 in the center and around the edges it says Banco Nacional. Anyone know what this coin is and a time zone. Back is kinda hard to see but it has like reef on it.

 

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[jewelerguy]

should say 5/10 . Argentina half reale mid 1800's I believe

 

[Dirtfisher707]

Yep. On closer inspection it looks like a 5. Thanks for the info. Do you know what kind of metal they were made from? And a good way to bring out he detail.

 

[Mackaydon]

Indeed it is:Addition to the database?: 5/10 Buenos Ayres 1831 ? Numista
Don...

 

[Mackaydon]

Copper: https://www.ngccoin.com/price-guide...0-real-km-3-1831-183127-cuid-12767-duid-43433
Don...