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<p>[QUOTE=&quot;NSP, post: 3111303, member: 74849&quot;]After the devices, letters, stars, numbers, etc. were punched into a die, the die would be heat treated to harden it so the die wouldn’t quickly wear out. Usually overdates are made from unused, unhardened dies, because it is a lot easier to overdate an unhardened die. To overdate a hardened die, the die would have to be heat treated to unhardened it, overdated, and then re-hardened. </p><p><br /></p><p>I can think of two cases (there may be others I don’t know of) of a hardened (used) die being overdated: 1806/5 quarter (the one above) and 1827/3/2 quarter. For the 1827/3/2, an unused 1822 die was overdated to 1823/2, hardened to strike &lt;2000 coins, unhardened to overdate it to 1827/3/2, and re-hardened to make a couple dozen coins.[/QUOTE]</p><p><br /></p>

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