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<p>[QUOTE=&quot;Conder101, post: 3309632, member: 66&quot;]The SG would seem to rule out a simple acid soak because an acid soak would not lower the SG and the value he got from the college is well below that of the alloy used in a 1972 cent.&nbsp; So it either is something unusual, or someone at the school blew the SG test.[/QUOTE]</p><p><br /></p>

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