Kazakhstan 1993 Tiyn types

Started by CameronK, March 30, 2018, 09:05:14 PM

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CameronK

I see there's a copper and brass variety of these. Is there a quick way to tell the difference? Is there a distinct yellow/ copper color difference?

Thanks!
Why? I coax stories out of unidentified coins.

Figleaf

Judging from the pictures in Numista, there is indeed a significant colour difference when the coins are in high grade. Both variants may look more alike when dirty, in which case, there is a weight difference to help you. When that is not helpful, the coins are too worn to be collected anyway. :'(

Peter
An unidentified coin is a piece of metal. An identified coin is a piece of history.

FosseWay

See my two 10 tiyin coins - 3863 is brass, 8044 is copper-plated brass.

Peter - are you sure about the weight difference? Mine (more or less Unc) weigh 3.38 and 3.40 grams respectively - i.e. the same, near as makes no difference.

FosseWay

And the 50s...

These are as I understand it brass- (3865) and copper- (8045) plated zinc. They weigh 7.14 and 7.26 g respectively - again, within a reasonable margin of error.

Figleaf

Just going by Numista figures. They have their problems, I guess.

Peter
An unidentified coin is a piece of metal. An identified coin is a piece of history.