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<p>[QUOTE=&quot;Kevin Mader, post: 3974972, member: 106826&quot;]Hydrozyncite is the deterioration of the substrate zinc so what happens is that once the copper plate/flash is compromised and exposed to the elements the destruction begins below the surface.&nbsp; I cringe when I find a high grade specimen Zincoln but can visually see split plating.&nbsp; Only a mater of time.&nbsp; Many folks are tricked into seeing RPMs and DDOs because of the trouble below. Given this would have been a major DDO, it would have been realized a long while ago. It’s reasonable to conclude what we are seeing is an optical ‘delusion’.[/QUOTE]</p><p><br /></p>

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