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<p>[QUOTE=&quot;rickmp, post: 1279130, member: 28047&quot;]Until the late 1980&#039;s, mint marks were hand punched into individual dies, if they were wrong, they were punched again over the earlier mark. Today, they are machined into the master die, making it impossible to have doubled or over mint marks.[/QUOTE]</p><p><br /></p>

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