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<p>[QUOTE=&quot;mynamespat, post: 2634584, member: 83738&quot;]I don&#039;t even really have an opinion without better pics.&nbsp; I just feel it&#039;s safe to say it is not a hardness test mark on the die.&nbsp; From my understanding the hardness tests performed on dies <i>in operation</i> were done with tools more closely resembling the Mohs hardness test tools:</p><p><img src="http://geology.com/minerals/photos/mohs-hardness-picks.jpg" class="bbCodeImage wysiwygImage" alt="" unselectable="on" /> </p><p>Tests were performed on places in the design where a single divot would not be noticeable/blend-in with the surrounding features.&nbsp; It is a quick simple go/no-go test to ensure that the hardness still rests within the given tolerances as layers are polished off.&nbsp; Hence why I used the 1921 16/17 berry as an example.</p><p><br /></p><p>I guess it&#039;s always possible a die that utterly failed the Rockwell Test was still put into operation to produce the coin like above.&nbsp; I just think that it is highly unlikely and if it were the case there would be at least another handful of examples making it highly research-able.[/QUOTE]</p><p><br /></p>

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