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<p>[QUOTE=&quot;Spark1951, post: 7777022, member: 90692&quot;]I think the proper term used is “split-plate doubling” and is addressed at Wexler under worthless doubling and also an article at error-ref.com.&nbsp; [USER=44615]@paddyman98[/USER] is right.</p><p><br /></p><p>It is a plating issue.&nbsp; I have seen it come and go in cycles over the life of Zincolns on different dates.&nbsp; The same goes with linear bubbles and gross surface bubbles. It really did take the contractors a while to smooth out the problems.&nbsp; The 2000 to 2008 runs had huge improvements.&nbsp; My own theory rests along the lines of alignment of the reverse die, and the strength of the strike on the USA area.</p><p><br /></p><p>Now, I actually despise the copper plated zinc cent.&nbsp; But I still work with them for other clients, so I have to be able to tell them why the coin has no value when I find them with split copper plating…imo…Spark[/QUOTE]</p><p><br /></p>

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