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<p>[QUOTE=&quot;medoraman, post: 1415893, member: 26302&quot;]Great information. Its unfortunate that these do sit in a depression, since &quot;black gunk&quot; around a mm is usually a telltale warning, but these naturally have it. I know its not right, but an old dealer I knew used to clean the black off with a toothpick to be able to see the surfaces of where the mm meets the field to verify these.[/QUOTE]</p><p><br /></p>

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