10 000 Reais

No institution called the Banco de Cabinda is recognized as a legitimate central bank. Cabinda is an Angolan exclave whose official currency is the Angolan kwanza, issued by the Banco Nacional de Angola. A 10,000-unit aluminium piece of 1.2 g from 2016 bearing this issuer name falls outside any documented sovereign or recognized local monetary authority — most likely a fantasy or novelty strike with no circulation history.