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How do UNC coins survive 300+ years
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<p>[QUOTE="scottishmoney, post: 1312820, member: 12789"]There are aspects of that Charles II coin that do indeed raise concerns - the darker fields suggest something happened in the history of the coin and probably more recently in it's existence.</p><p><br /></p><p>The challenge with those much older coins is that they can indeed be dipped, and the fact being gotten away with because they do not have the smooth surfaces from the dies that modern coins do. It is much more difficult to dip an 1897 IHC and get away with it because the original luster will be destroyed by the process.</p><p><br /></p><p>It is indeed possible under near or ideal conditions for a coin to survive in an "uncirculated" state. There are Roman coins that have indeed toned over time as bronze does - but they show no wear and were stored in earthen vessels in the deserts of North Africa. In contrast unfortunately are the bronzes of Syracuse and Ephesos which I wish were found in more ideal conditions but alas they are miserable. For far younger coins I have a bright red mint fresh 1923 Lincoln that I purchased several years ago - it was found in an original roll in an SDB of an estate. It is obvious that it was in a climate controlled setting for 80+ years. Now it is a PCGS holder and intercept shield - I hope they can preserve the coin as it was for 80+ years.[/QUOTE]</p><p><br /></p>
[QUOTE="scottishmoney, post: 1312820, member: 12789"]There are aspects of that Charles II coin that do indeed raise concerns - the darker fields suggest something happened in the history of the coin and probably more recently in it's existence. The challenge with those much older coins is that they can indeed be dipped, and the fact being gotten away with because they do not have the smooth surfaces from the dies that modern coins do. It is much more difficult to dip an 1897 IHC and get away with it because the original luster will be destroyed by the process. It is indeed possible under near or ideal conditions for a coin to survive in an "uncirculated" state. There are Roman coins that have indeed toned over time as bronze does - but they show no wear and were stored in earthen vessels in the deserts of North Africa. In contrast unfortunately are the bronzes of Syracuse and Ephesos which I wish were found in more ideal conditions but alas they are miserable. For far younger coins I have a bright red mint fresh 1923 Lincoln that I purchased several years ago - it was found in an original roll in an SDB of an estate. It is obvious that it was in a climate controlled setting for 80+ years. Now it is a PCGS holder and intercept shield - I hope they can preserve the coin as it was for 80+ years.[/QUOTE]
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