Meaning Of "Decreto De 1870" On A Brazilian 2000 Reis 1889

Many South/Central American coins have a date of the law that specified the fineness and weight of the coin. I am assuming that this is what they were referring to here also?.

960Coins, I can't see the country of origin of you. Where are you from? It seems you are an expert of Brazil 960 Reis, how about those 640 Reis? I am not familiar with Brazil old coin especially those 640 Reis; one reason is the lacking of relevant reference books from me. I have two of them that I think they are fake but the edge of them are perfectly minted. The one I believe is genuine also has a similarly well-minted edge. So I find it difficult to distinguish the fake from genuine by the edge for these coins. Do you think so? Please have a look of them. Henry

Fake! 18.71 grams, 37.7mm, nicely toned.





Another fake! 19.03 grams, 38.0mm (must be fake because I found another item of same position worn from ebay years ago)





Genuine! 17.92 grams 36.6-37.3mm

Thank you jcmworld. I have no idea about toning. When I started to collect silver coins, I supposed a beautiful silver coin should have a silvery lustren so I rubbered some silver coins to remove the toning layer and now I regretted to do so because I have spoilt that coins. Not only me, I saw some Chinese coin seller also cleaned and wiped the silver coins so they thought the attractiveness of a silvery coin would sell a higher price. Maybe the cultural difference that makes us not to appreciate the toning of a coin. Henry

Aside from the artificial toning of the first one, I don't see anything immediately suspicious about those 640s. Note that 640 reis were not overstruck, so it's to be expected that the edges are generally better-formed.