Цитата: "CassTaylor"If you're so certain it's not real, then chances are it's a contemporary fake. Why? I'm basing this on 2 things:
1) It appears to have wear from circulation, in a natural manner not unalike real copper period issues.
2) It appears to be a relatively low value type, thus removing incentive for a modern forger to fake such a coin, when they can spend their time, resources and effort on Morgan dollars instead.
Agree with you. And indeed the wear is compatible to a 200-year copper (I have others from that time).
And I found the text about the fake coppers of 1820-1830:
https://brasilmoedas.com.br/artigos/#moedas-falsas (the coin on first photo is nearly identical to mine).
Here's the part the says that there were more fakes than genuines in some places:
"A falsificação de moedas era uma situação tão crítica que o governo da Província da Bahia, comunicou à corte do Rio de Janeiro que a proporção de moedas falsas era de 2/3 do meio circulante no comércio local, o que obrigava as próprias repartições públicas a aceitarem tais moedas, pois a recusa das mesmas causaria um colapso total no pequeno comércio, tipo gêneros alimentícios e de sobrevivência, o que afetaria principalmente as pessoas mais pobres e que eram, neste processo de fraudes e corrupção, as que menos tinham culpa."
"The counterfeiting of coins was such a critical situation that the government of the Province of Bahia informed the court of Rio de Janeiro that the proportion of counterfeit coins was 2/3 of the circulating medium in local commerce, which obliged the public offices to accept such coins, since their refusal would lead to a total collapse in small-scale food-and-surplus-type commerce, which would primarily affect the poorest people who were least guilty in this process of fraud and corruption."
My coin have a mintmark B of Bahia, which according to the text is one of the places with most counterfeit coins circulating. This and your answer confirm my theory of contemporary fake.
I'll keep the coin, this coin is unoficially part of our history, that's why I'm not upset when I found out that it was a fake (I still hate fakes, but this one I'll pass).
And thanks for the answer Cass.