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<p>[QUOTE=&quot;Oldhoopster, post: 8320665, member: 84179&quot;]The mint makes a master hub for each coin. They use the master hub to make master dies.&nbsp; Master dies are used to make working hubs.&nbsp; Working hubs are used to make working dies and the working dies strike coins.</p><p><br /></p><p>If I recall correctly, a working die for a quarter has a life of 275,000 strikes, so the mints would use hundreds of dies during the year</p><p><br /></p><p>Until 1989, the mint would stamp the mm into each working die individually.&nbsp; Starting in 1989 the mint added the mm upstream in the process (I believe it was to the Master die, but don&#039;t quote me).&nbsp; That means that numerous working dies will come from this master die and have the exact same location and appearance.&nbsp; </p><p><br /></p><p><a href="https://www.usmint.gov/learn/production-process/die-making" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://www.usmint.gov/learn/production-process/die-making" rel="nofollow">https://www.usmint.gov/learn/production-process/die-making</a></p><p><br /></p><p><a href="https://www.coinnews.net/2014/01/06/how-the-denver-mint-makes-dies-to-produce-coins/" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://www.coinnews.net/2014/01/06/how-the-denver-mint-makes-dies-to-produce-coins/" rel="nofollow">https://www.coinnews.net/2014/01/06/how-the-denver-mint-makes-dies-to-produce-coins/</a>[/QUOTE]</p><p><br /></p>

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