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<p>[QUOTE=&quot;Hobo, post: 1711966, member: 11521&quot;]Google &quot;specific gravity coin&quot; for a more complete answer. Basically you weigh the coin dry and suspended in water. Then you plug those weights into a formula. You can then compare the SG of your coin to the SG of known US coin compositions. </p><p><br /></p><p><br /></p><p><br /></p><p>Perhaps but not all coin dealers are adept at or equipped to conduct a SG test. You can do the SG test yourself if you have a decent scale and enough skill to construct your own device to suspend your coin in water while weighing it.[/QUOTE]</p><p><br /></p>

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