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<p>[QUOTE=&quot;Pete Apple, post: 3580682, member: 103982&quot;]I asked the Mint if there was a time in the past when a Rockwell Test was performed on the face of a die. Here is their answer:</p><p><br /></p><p>&quot;No, there was not a time in the past when hardness testing was done on a die face.&nbsp; However, there may have been isolated instances of&nbsp; hardness testing on the face of the die for other purposes outside of normal production (for example, research and development, root-cause investigation, or equipment testing/acceptance).&quot;[/QUOTE]</p><p><br /></p>

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