I don't believe the purity of the silver wire kopek were that high. There may be the possibility that the Alexei silver kopek were of higher...
Because this was struck on silver wire, there can be big variance. I am not aware of any studies but you will need to send it for XRF to find out...
I had a look around and didn't think that Cuba had a mint! Trying to find their official homepage but it looks like they may not have one?...
I like it! It's going to make the counterfeiters a harder time to counterfeit such features.
I'm curious to know where Cuban coins are struck these days. As far as I am aware, early Cuban coinages were struck in the US before the US...
For historical price quote of platinum, please check here: http://www.kitco.com/charts/liveplatinum.html Note that the prices of metals are...
I guess counterfeit bullion is a serious issue which is already happening with gold bullion. Fortunately silver is not as high as it used to be....
Have to add - the Kirin 10 cash also looks odd as well. It could be varieties. In particular the calligraphy looks wrong as well as the number...
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