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<p>[QUOTE=&quot;TypeCoin971793, post: 4950382, member: 78244&quot;]Here are some dies from before the use of collars by the US mint. Note how the dentils go all the way to the edge of the die and fall away. Any metal beyond the edge of the die will have a raised appearance and would not be struck.</p><p><br /></p><p>[ATTACH=full]1189969[/ATTACH] [ATTACH=full]1189971[/ATTACH] [ATTACH=full]1189972[/ATTACH]</p><p><br /></p><p>And here are some dies from after collars began being used. The dentils stop before the edge of the die, and there is a flat rim that would have struck down on the raised lip of the coin, thereby flattening it and removing pre-strike damage.</p><p><br /></p><p>[ATTACH=full]1189974[/ATTACH] [ATTACH=full]1189975[/ATTACH] [ATTACH=full]1189976[/ATTACH]</p><p><br /></p><p><br /></p><p><br /></p><p>The small-diameter dimes were struck using a collar, unlike the large diameter dimes. Look at these three dimes. They all had a misaligned die that caused a thin lip along part of the edge. That means that the dies for the capped bust dimes had the flat rim beyond the dentils.</p><p><br /></p><p>[ATTACH=full]1189983[/ATTACH] [ATTACH=full]1189982[/ATTACH] [ATTACH=full]1189981[/ATTACH]</p><p><br /></p><p>So to answer your question, maybe, since the rims would have seen much less pressure than the rest of the surface of the coin. Especially on a screw press. That means any pre-strike damage on the rims of the planchet after going through the upsetting mill may not have been fully struck out. The easy way to tell the difference is if there is metal movement and if the metal looks flattened in any way.</p><p><br /></p><p>Also note how much flatter the rims on the 1837 above are compared to those of the 1831 and 1833. The steam press was introduced in 1836, so that suggests that my hypothesis is correct. Also supporting my hypothesis is that the rims are rougher opposite to the raised lip, which is the side that saw a lower striking pressure.</p><p><br /></p><p><br /></p><p><br /></p><p>Looks like a planchet flaw to me.[/QUOTE]</p><p><br /></p>

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