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<p>[QUOTE=&quot;robp, post: 24837131, member: 96746&quot;]Given it looks dug, it has probably been in acidic soil which has reacted with the metal over time and reduced the weight. You will get metal loss across all surfaces assuming the coin was fully in contact with wet soil which ought to mean the coin is roughly 20-25% thinner. i.e about 1.3-1.4 mm thick and a corresponding reduction in the diameter. That&#039;s assuming equal reduction everywhere and not allowing for preferential ingress of reactant into the metal where there will be flaws in the crystalline structure at the microscopic level due to metal flow on striking.[/QUOTE]</p><p><br /></p>

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