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Help please with Ptolemy XII tetradrachm authenticity
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<p>[QUOTE="ValiantKnight, post: 8114086, member: 44210"]I had recently posted this is my Top 10 Ptolemies thread. When it was in auction, the listing said that it weighed 10.72 grams, low but I figured it had metal that had leeched out over time as shown by its porosity. When I weighed it recently, it turned out that the coin was actually 8.1 grams. Definitely not as described and way lower than typical examples in the 13-14 gram range.</p><p><br /></p><p>It has no seam, does not look cast, and a couple of tiny copper oxide encrustations, which point towards it possibly being genuine. A friend I spoke to informed me that silver-plated imitations were struck around the time of genuine examples with good style and legends. I did a search on acsearch and found just one that’s a similar weight (7.59 grams) that was sold by Agora in 2017, described by them as a “lightweight issue”. The style looks very similar. In addition, my example looks to have what looks like traces of bronze disease in a few of the cracks on the surface, which I’m thinking supports my coin possibly being silver-plated.</p><p><br /></p><p>[ATTACH=full]1411979[/ATTACH]</p><p><br /></p><p>The Agora example on acsearch (<a href="https://www.acsearch.info/search.html?id=4055414" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://www.acsearch.info/search.html?id=4055414" rel="nofollow">https://www.acsearch.info/search.html?id=4055414</a>):</p><p><br /></p><p>[ATTACH=full]1411980[/ATTACH]</p><p><br /></p><p>Any help with this matter is appreciated, thank you.[/QUOTE]</p><p><br /></p>
[QUOTE="ValiantKnight, post: 8114086, member: 44210"]I had recently posted this is my Top 10 Ptolemies thread. When it was in auction, the listing said that it weighed 10.72 grams, low but I figured it had metal that had leeched out over time as shown by its porosity. When I weighed it recently, it turned out that the coin was actually 8.1 grams. Definitely not as described and way lower than typical examples in the 13-14 gram range. It has no seam, does not look cast, and a couple of tiny copper oxide encrustations, which point towards it possibly being genuine. A friend I spoke to informed me that silver-plated imitations were struck around the time of genuine examples with good style and legends. I did a search on acsearch and found just one that’s a similar weight (7.59 grams) that was sold by Agora in 2017, described by them as a “lightweight issue”. The style looks very similar. In addition, my example looks to have what looks like traces of bronze disease in a few of the cracks on the surface, which I’m thinking supports my coin possibly being silver-plated. [ATTACH=full]1411979[/ATTACH] The Agora example on acsearch ([URL]https://www.acsearch.info/search.html?id=4055414[/URL]): [ATTACH=full]1411980[/ATTACH] Any help with this matter is appreciated, thank you.[/QUOTE]
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Help please with Ptolemy XII tetradrachm authenticity
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