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<p>[QUOTE=&quot;lehmansterms, post: 2786457, member: 80804&quot;]If you have had any experience trying to work with an object on a spinning surface, it&#039;s easy to imagine how the &quot;spike&quot; which was to hold the blank steady and centered on the wheel while it was planed and/or pontils were shaved off drifted. You have probably noticed that anything that throws a rotating system out of round or that hits it at all off-center creates significant forces. Evidently the spike was levered down into position pinning the flan to the platen, but at some point in the process the pressure on the lever holding it down was partially released.&nbsp; The resulting coin being a bit off-round shows either how an oblong flan might scoot around and upset the planing process, or how the planing process might result in an oblong flan if the tool caused the workpiece to &quot;wander&quot; at any point during the processes.&nbsp; You can clearly see the incidental concentric &quot;toolmark&quot; around the larger-than-normal center that was created by the coin wandering around the center at some point while it was being tooled.[/QUOTE]</p><p><br /></p>

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