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Intermediate Quiz: What caused these marks?
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<p>[QUOTE="messydesk, post: 4848839, member: 1765"]I guess to leave scars marks like this, it would have to have a corrosive in contact with the coin like a rubber band. Other black spots that would leave these kinds of scars that would be from dip residue, spittle, sneezle, and what not would have a different shape. Terminal toning not from contact wouldn't have well-defined borders.</p><p><br /></p><p>So how to tell between this and a planchet flaw? I imagine the luster of the coin might be an indicator. The full-coin picture looks as though it could be... well... anything. One thing about planchet flaws this shape is that they often have black inclusions smeared through them, and those aren't coming out. Of course, they really don't have to, so I guess looking at the marks in context with the rest of the coin would give you a pretty good idea what you're looking at.[/QUOTE]</p><p><br /></p>
[QUOTE="messydesk, post: 4848839, member: 1765"]I guess to leave scars marks like this, it would have to have a corrosive in contact with the coin like a rubber band. Other black spots that would leave these kinds of scars that would be from dip residue, spittle, sneezle, and what not would have a different shape. Terminal toning not from contact wouldn't have well-defined borders. So how to tell between this and a planchet flaw? I imagine the luster of the coin might be an indicator. The full-coin picture looks as though it could be... well... anything. One thing about planchet flaws this shape is that they often have black inclusions smeared through them, and those aren't coming out. Of course, they really don't have to, so I guess looking at the marks in context with the rest of the coin would give you a pretty good idea what you're looking at.[/QUOTE]
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Intermediate Quiz: What caused these marks?
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