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<p>[QUOTE="mikediamond, post: 4458854, member: 1859"]Chris, beginning in 1992 (first at Denver), the US Mint began a slow transition from the conventional die setup (obverse die as hammer die) to the inverted setup (reverse die as hammer die). The changeover was almost complete by 2002. The old presses were trotted out on rare occasions as late as 2007 (again at Denver). Since then, all business strikes have been struck with the inverted setup. Proofs are still largely struck with the conventional setup.[/QUOTE]</p><p><br /></p>
[QUOTE="mikediamond, post: 4458854, member: 1859"]Chris, beginning in 1992 (first at Denver), the US Mint began a slow transition from the conventional die setup (obverse die as hammer die) to the inverted setup (reverse die as hammer die). The changeover was almost complete by 2002. The old presses were trotted out on rare occasions as late as 2007 (again at Denver). Since then, all business strikes have been struck with the inverted setup. Proofs are still largely struck with the conventional setup.[/QUOTE]
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