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<p>[QUOTE="playpossum0985, post: 8334892, member: 23806"]Not to beat a striated horse to death, (No offence to the Majestic Zebra) but the Maya Angelou quarter is confusing. On all of the others I have, the striations are across the entire coin and on both sides. I always thought it was caused by dirty or seized pinch rollers during the lamination or punch process. This explains the discoloration due to friction as well... However, the MA quarter has a well-defined crescent shape on the obverse, and not so much on the reverse. I could imagine it being due to inconsistencies in the planchette thickness, but I would think that upon being struck this would move the metals towards the thinnest section and at least somewhat distort the parallel lines. None of these seem to be affected when the coin is struck... Another clue lies in the edge. Every coin I have with this type of striations has a jagged edge on one side and rolled smooth on the other. </p><p><br /></p><p><br /></p><p>[ATTACH=full]1477710[/ATTACH]</p><p><br /></p><p>[ATTACH=full]1477708[/ATTACH] </p><p><br /></p><p>So, what am I missing? </p><p><br /></p><p>[ATTACH=full]1477711[/ATTACH] </p><p><br /></p><p>[ATTACH=full]1477712[/ATTACH][/QUOTE]</p><p><br /></p>
[QUOTE="playpossum0985, post: 8334892, member: 23806"]Not to beat a striated horse to death, (No offence to the Majestic Zebra) but the Maya Angelou quarter is confusing. On all of the others I have, the striations are across the entire coin and on both sides. I always thought it was caused by dirty or seized pinch rollers during the lamination or punch process. This explains the discoloration due to friction as well... However, the MA quarter has a well-defined crescent shape on the obverse, and not so much on the reverse. I could imagine it being due to inconsistencies in the planchette thickness, but I would think that upon being struck this would move the metals towards the thinnest section and at least somewhat distort the parallel lines. None of these seem to be affected when the coin is struck... Another clue lies in the edge. Every coin I have with this type of striations has a jagged edge on one side and rolled smooth on the other. [ATTACH=full]1477710[/ATTACH] [ATTACH=full]1477708[/ATTACH] So, what am I missing? [ATTACH=full]1477711[/ATTACH] [ATTACH=full]1477712[/ATTACH][/QUOTE]
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Post your coins with striations.
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