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<p>[QUOTE=&quot;desertgem, post: 1601534, member: 15199&quot;]Sometimes a coin is struck twice, but that is not the &quot;doubling&quot; that is discussed above. The die that is used for the striking of the coin directly is called the working die. It is made by pressing a die blank against a working hub with a positive design, which is turn was made from a master die ( negative design) which in turn was made from a master hub ( positive design). The only process where striking occurs in the last stage on the planchets. The transfers from hubs to dies occurs by a process of pressing the two ( hub-die) together with great pressure. This process hardens the metal, so they are separated and heated to soften the die which is then taken to the press and squeezed again with a hub ( IF they are aligned, all is well~ if one is slightly rotated or tilted in the process of squeezing , then a doubled die will be produced.</p><p><br /></p><p>It is a cascade process, so if the doubling occurs in the earliest stages, all of the succeeding dies will show it and it will be of little significance as it is extremely common ( master hub doubling). If it occurs in the last stage, it is only on the coins struck by that single die out of thousands of dies.</p><p><br /></p><p>When &quot;Single Squeeze Hubbing&quot; came into being, the removal/heating/reinserting&nbsp; stopped and only a single squeeze under very high pressure was thought to eliminate doubled dies, but it just produced them a different way.</p><p><br /></p><p>Think of the flagpole, with a 8 ft circular base being removed from the ground and then reinserted anew, the chances it would be a little off or slightly tilted may seem easier to understand.</p><p><br /></p><p>Jim[/QUOTE]</p><p><br /></p>

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