Here are the early Soviet coins from 1921 to 1957. This is a lot tougher: http://www.gxseries.com/numis/rus_new_type/1921_1957.htm
It's plated steel if I'm not wrong. There isn't much copper on them.
Very interesting. The certificate for the coins are definately wrong as it's supposely 1000 NT$ not 50 NT$ and therefore it's not an ounce of...
There is a coin that is bigger than the monster 5 kopek: [img] And as well as the older Catherine II 5 kopeks
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