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Interesting NGC Attribution 1967 40% Silver Half Dollar - Incorrect?
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<p>[QUOTE="Conder101, post: 4611641, member: 66"]The outer layer on a coppernickel clad is 16% of the weight of the coin. If we assume the thickness of the outer layer on a 40% silver half is the same as on the coppernickel clad, we can assume the weight will also be about 16% (Actually it will be a little more because the outer layers have a higher density than the center on the 40% silver half. On the coppernickel clad coins the density of the outer and center layers is almost identical.)</p><p><br /></p><p>16% of the weight of a 40% silver half is 1.84 grams. Since the outer layers would be a little more than 16%, 2 grams is very likely.</p><p><br /></p><p><br /></p><p>May I suggest a red book? <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie1" alt=":)" unselectable="on" unselectable="on" />[/QUOTE]</p><p><br /></p>
[QUOTE="Conder101, post: 4611641, member: 66"]The outer layer on a coppernickel clad is 16% of the weight of the coin. If we assume the thickness of the outer layer on a 40% silver half is the same as on the coppernickel clad, we can assume the weight will also be about 16% (Actually it will be a little more because the outer layers have a higher density than the center on the 40% silver half. On the coppernickel clad coins the density of the outer and center layers is almost identical.) 16% of the weight of a 40% silver half is 1.84 grams. Since the outer layers would be a little more than 16%, 2 grams is very likely. May I suggest a red book? :)[/QUOTE]
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Interesting NGC Attribution 1967 40% Silver Half Dollar - Incorrect?
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