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<p>[QUOTE=&quot;cladking, post: 44604, member: 68&quot;]In the past there has been some variation not only in the rate of wear of specific dates of clad coins but also how this rate varies over time.&nbsp; The 1972 quarter shows very little loss of metal until it gets down to XF and then it&#039;s like most other dates.&nbsp; The &#039;70 has worn very rapidly right from the beginning.&nbsp; Other dates like the &#039;84-P show wear quickly because they have narrow and low rims to protect the central device.&nbsp; </p><p><br /></p><p>Many of these differences may be caused by differences in annealing but they could possibly be differences in methods of bonding the layers.[/QUOTE]</p><p><br /></p>

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