Message:

<p>[QUOTE=&quot;Burton Strauss III, post: 2567452, member: 59677&quot;]At the time, master dies were used with the design, but the year was hand punched into the working dies (later on it would be punched into the master hub and today it&#039;s part of the original) - see <a href="http://www.coinnews.net/2013/09/13/how-the-philadelphia-mint-makes-hubs-and-dies-to-produce-coins/" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://www.coinnews.net/2013/09/13/how-the-philadelphia-mint-makes-hubs-and-dies-to-produce-coins/" rel="nofollow">http://www.coinnews.net/2013/09/13/how-the-philadelphia-mint-makes-hubs-and-dies-to-produce-coins/</a> for the current process.</p><p><br /></p><p><br /></p><p>In order to punch the date into the working die, it has to be annealed and quenched to specific temperatures to soften the metal. Then it&#039;s annealed to a different temperature and quenched to reharden.</p><p><br /></p><p>Die sinkers would test the die&#039;s hardness by punching into a part of the die that wouldn&#039;t (shouldn&#039;t) be visible in the finished die. He missed.[/QUOTE]</p><p><br /></p>

Your name or email address:

Do you already have an account?

• No, create an account now.
• Yes, my password is:
• Forgot your password?

Stay logged in