another 1992-d lincoln

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mikev50
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another 1992-d lincoln

#1 Unread post by mikev50 »

wonder what is going on with the mint mark--looking for opinions--
1992-D (6).JPG
1992-D (5).JPG
1992-D (7).JPG
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PetesPockets55
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Re: another 1992-d lincoln

#2 Unread post by PetesPockets55 »

I believe that is oxidation of the zinc under the copper plating.
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Re: another 1992-d lincoln

#3 Unread post by Daniel »

It is zinc oxide, the plating split around the mint mark and the zinc oxidized and that reaction forms a white powder.
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