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Posted 04/11/2016 4:41 pm
It's likely just discolouration that is common on tombacs, though, it would be interesting to have specimen tombacs tested for metal to see if there is any difference between the specimen and their circulating counterpart.
I think because the surfaces are so mirrored that the discolouration shows a different effect. It's almost as it was struck with a chrome plated die. Very interesting issue, indeed.
I think because the surfaces are so mirrored that the discolouration shows a different effect. It's almost as it was struck with a chrome plated die. Very interesting issue, indeed.
