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<p>[QUOTE=&quot;CamaroDMD, post: 2947854, member: 5233&quot;]We all know that a proof coin is different from a business strike due to it&#039;s method of manufacture.&nbsp; They are struck multiple times with more pressure.&nbsp; They are struck using highly polished dies with laser etched devices to give the mirror fields and frosted devices (at least for modern brilliant proofs) and as such a proof coins is always a proof coin regardless of it&#039;s grade because of how it was made.</p><p><br /></p><p>From 1965-1967, the US mint stopped making proof sets and normal mint sets and instead made &quot;Special Mint Sets&quot; which contain coins that aren&#039;t really circulation business strikes...but also aren&#039;t proofs.&nbsp; They are almost something in between (or so I have always assumed).</p><p><br /></p><p>What I have wondered for a long time is this...how were the SMS coins manufactured compared to the circulation business strike coins from those years and proof coins from that era (1964, 1968, ect.)?&nbsp; How the did the strike pressure, number of strikes, die preparation differ from these three types of coins?[/QUOTE]</p><p><br /></p>

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