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<p>[QUOTE=&quot;Marshall, post: 8116680, member: 21705&quot;]To me the most obvious is the uprights of IBE. On the S-13, the upright of B is closer and closer to parallel to the E while on the S-16 it is closer and closer to parallel to the I which gives it a more CC rotation relative to E</p><p><br /></p><p>The beads at the tip of the cap are also differently spaced and sized for a secondary diagnostic. Both these can be seen on lower grade examples, while other differences can be seen on higher grade examples.</p><p><br /></p><p>I find it interesting that every one of the three NC-6s was originally attributed as S-16 and now this S-13 is also attributed as S-16.[/QUOTE]</p><p><br /></p>

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