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<p>[QUOTE=&quot;robinjojo, post: 8282250, member: 110226&quot;]Here&#039;s a coin that I&#039;ve posted before, since it has been mostly a sad tale of bronze disease, something that seems to occur with this coinage from time to time.&nbsp; </p><p><br /></p><p>The bronze disease on this coin was in a fairly deep pocket on the reverse, running to the left edge, in an area that I believe was a lamination (separation of metal) that happened at the time of striking.&nbsp; There is a line running from the edge to the pocket.&nbsp; The pocket appears to be quite linear in shape.&nbsp; My theory is that water and copper oxides got into the pocket and, over the centuries, formed the characteristic red deposit that accompanies bronze disease.</p><p><br /></p><p>Well, after several immersions in a strong solution of distilled water and washing soda, and some scraping, the bronze disease appears to be gone.&nbsp; There is one tiny patch of green, but it appears to be hard and benign.</p><p><br /></p><p>This coin, of Najm al-Din Alpi, SS type 27, AD 547-572, is interesting because it has the normal countermark on the neck, obverse, and what appear to be two more, a small one below the chin and another on the cheek. </p><p><br /></p><p>10.89 grams</p><p><br /></p><p>[ATTACH=full]1462871[/ATTACH][/QUOTE]</p><p><br /></p>

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