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<p>[QUOTE=&quot;iPen, post: 2467457, member: 69760&quot;]I&#039;ve noticed this on some of my US and other coins, but this recent acquisition reminded me of this phenomenon. On this 1942-P Mercury dime below, which also happens to be from a rotated die on the reverse, at around the 2-3 o&#039;clock position (above E PLURIBUS UNUM and below AMERICA), there&#039;s a separate, small, and circular area with its own cartwheel effect. It appears to be uninterrupted by the larger central cartwheel effect, which in turn seems to be absent in that area.</p><p><br /></p><p>I&#039;ve also seen multiples of these smaller cartwheel areas on other coins.</p><p><br /></p><p>Is it due to fluctuations in pressure when striking (e.g. due to a rotated die, does the obverse die and the reverse die cause different areas of the planchet to experience elevated pressure levels, enough so that the cartwheel can be found elsewhere from the center?)?</p><p><br /></p><p>Thanks in advance!</p><p><br /></p><p><br /></p><p><img src="https://www.cointalk.com/proxy.php?image=http%3A%2F%2Fi1228.photobucket.com%2Falbums%2Fee451%2Fkovacs22%2FP1090098_zpskgmcgrh1.jpg&amp;hash=009d8a66de5f8866cb5488efb5c4c48c" class="bbCodeImage wysiwygImage" alt="" unselectable="on" />[/QUOTE]</p><p><br /></p>

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