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<p>[QUOTE=&quot;John Anthony, post: 1914936, member: 42773&quot;]Let me give you an example.</p><p><br /></p><p>In the early 70&#039;s, the mint was struggling with the technology to properly strike up copper-nickel clad coins. It was a new medium. In addition to that, the presses in Philadelphia were weaker than those of Denver, so in general, 1971D coins are better struck than 71P&#039;s. So you might find a weakly-struck 71P in holder that says MS64, to pick a random grade. That coin will have weak features, with considerable planchet chatter at the edges, but decent luster.</p><p><br /></p><p>Now fast-forward to the 80&#039;s, wherein the striking technology is improved, so you have a coin with strong devices and equally strong luster. But let&#039;s throw in the variable of contact marks. Suppose this coin got jostled around a bit, and a grader thought, &quot;nice coin...could be a 66, but the bag marks pull it down to 64.&quot;</p><p><br /></p><p>Now you have the mystified collector looking at two coins, scratching his head. Each are graded at 64 but look very different.[/QUOTE]</p><p><br /></p>

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