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<p>[QUOTE=&quot;desertgem, post: 4604595, member: 15199&quot;]That might be hard to get a single answer. I doubt it was the silver metal itself , as although major studies have been done on Ancient coins, I do not know of any on the appropriate Morgan-Peace age. I suspect it was more advances in the techniques and materials the mint used along with the changes in the machinery to make the coins.</p><p><br /></p><p>I too am open to other possibilities. Maybe XRF results on US coins as to material separate from silver /copper, etc. There are a few threads on the internet forums on it, but not a specific line of research along the transition from Morgan to Peace. If I ever get time, I can take such photos with other silver coins than dollars , but I do not know when <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie3" alt=":(" unselectable="on" unselectable="on" />&nbsp;&nbsp; Jim[/QUOTE]</p><p><br /></p>

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