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<p>[QUOTE="jallengomez, post: 1700267, member: 19748"]Until 1990, the mint marks were punched into the dies by hand. Sometimes they bounced or sometimes the mint worker repositioned the mark. Thus the re-punched mint mark. From 1990 on the marks were engraved into the dies thus ending the era of RPMs.[/QUOTE]</p><p><br /></p>
[QUOTE="jallengomez, post: 1700267, member: 19748"]Until 1990, the mint marks were punched into the dies by hand. Sometimes they bounced or sometimes the mint worker repositioned the mark. Thus the re-punched mint mark. From 1990 on the marks were engraved into the dies thus ending the era of RPMs.[/QUOTE]
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