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<p>[QUOTE=&quot;John Burgess, post: 4914019, member: 105098&quot;]I&#039;m out of ideas except it&#039;s a heavy planchet but still likely within tolerance, but barely depending on their scale in 1919 it could pass.</p><p><br /></p><p>As far as off metal, the 1920 struck on a argentine 10 centavo planchet it was a copper nickel planchet and it wouldn&#039;t look like your&#039;s does. There is no &quot;list&quot; to go by really. You&#039;d have to do your own research into what the mint was doing on a given year, figure out if it even applies or was a planchet from someone&#039;s pocket and had nothing to do with coins struck for other countries, do a spetroanalysis and specific gravity testing to find out the composition of the metal, ect.</p><p><br /></p><p>I was really hoping it could be explained away by the scale being off because the rabbit hole you want to go down is a deep hole trying to identify a wrong planchet correctly when you don&#039;t know where to even start.</p><p><br /></p><p>I would suggest a micrometer, measure it for diameter and thickness.</p><p>The diameter of a normal Lincoln cent is 19.05mm.</p><p>The Thickness of a normal Lincoln cent is 1.55mm.</p><p><br /></p><p>All that aside. The planchet itself should be 95%copper,&nbsp; 5%zinc.</p><p>I wouldn&#039;t rule out improper mixed alloy that&#039;s making it heavier a bit as the reason for it weighing as it does either before chasing down data from 1919 from the san fancisco mint.</p><p>For sure all through the teens and 20s they had alloy mixing issues, maybe this was light on zinc and heavy on copper... would take a specific gravity test and spectroanalysis to determine that though.</p><p><br /></p><p>Good luck[/QUOTE]</p><p><br /></p>

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