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<p>[QUOTE=&quot;Conder101, post: 3739435, member: 66&quot;]Not that unusual on the 1983 S proofs.&nbsp; That was the first year of the copper plated zinc proofs and the mint did not have experience with proof Zincolns and how the plating would hold up with the double striking.&nbsp; In later years planchets for the proof cents had a thicker plating layer which greatly reduced the problem.[/QUOTE]</p><p><br /></p>

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