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<p>[QUOTE=&quot;Conder101, post: 2579637, member: 66&quot;]The 1981 cent should read 95% copper 5% zinc, that is the correct alloy for that year.</p><p><br /></p><p>1982 comes with two different compositions, 955 Cu 5% Zn like the 1981, and it also comes as pure copper plated over Zinc.&nbsp; You have one of each type.&nbsp; The first one is reading as 95% Cu and 5% Zn.&nbsp; On the second one and the 1983 cent the machine is reading not just the surface but is actually penetrating slightly below it and is reading a significant amount of the subsurface zinc and giving you an overall reading of around 40 - 45% zinc and the balance being Copper.&nbsp; If it was reading just the surface it would read nearly 100% copper.[/QUOTE]</p><p><br /></p>

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