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<p>[QUOTE=&quot;desertgem, post: 1549006, member: 15199&quot;]The die&#039;s image is of course reversed, so the numeral is incluse and the field is raised. As metal flow occurs over the edges at the raised/incluse border of a device such as the number, it molecularly acts as an abrasive. the steel die is much harder than copper, but under high pressure and tens of thousands of strike, erosion/deterioration occurs on the edge rounding it off, then it will appear as a raise area on the struck coin. That is why most often die deterioration looks like the original device ( same curve/shape). Most often the deterioration occurs in the direction of metal flow and most apparent where there is a sharp change of direction of the die surface ( as mentioned above). Not common on smooth transition from a flat area to raised, visa versa.[/QUOTE]</p><p><br /></p>

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