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<p>[QUOTE="Ripley, post: 1118237, member: 19199"]<span style="color: #ff00ff"><i>Well as for the distortion by some of the letters. This happens when a coin is overcooked while cleaning with electrolysis. The metal overheats ant that is the result. As for the center hole. In the late 19th and early 20th centuries. A process to identify metals was a brinnel hardness test. This test uses a diamond bit dropped from a measured height and records the bounce.This test leaves a cone shaped indentation in the metal being tested. Maybe, some silver was lapped into a cone. Here are a few examples of Brinnel cones and electro overheating. Hope this helps. </i></span></p><p>Brinnel Damage - </p><p><img src="https://picasaweb.google.com/Ripley44mag/CoinsOfTheAncientWorld#5496549041671267234" class="bbCodeImage wysiwygImage" alt="" unselectable="on" /></p><p><br /></p><p>This is the reason why there is damage to center of many coins.</p><p><br /></p><p>Electro overcooking distortion -</p><p><img src="https://picasaweb.google.com/Ripley44mag/CentralAmericaSouthAmericaMexicoCaribbean?locked=true#5457564902683622370" class="bbCodeImage wysiwygImage" alt="" unselectable="on" /></p><p> </p><p>Note distortion and burn at the 8 o'clock position behind the "Z" Zacatas mint mark.[/QUOTE]</p><p><br /></p>
[QUOTE="Ripley, post: 1118237, member: 19199"][COLOR="#ff00ff"][I]Well as for the distortion by some of the letters. This happens when a coin is overcooked while cleaning with electrolysis. The metal overheats ant that is the result. As for the center hole. In the late 19th and early 20th centuries. A process to identify metals was a brinnel hardness test. This test uses a diamond bit dropped from a measured height and records the bounce.This test leaves a cone shaped indentation in the metal being tested. Maybe, some silver was lapped into a cone. Here are a few examples of Brinnel cones and electro overheating. Hope this helps. [/I][/COLOR] Brinnel Damage - [IMG]https://picasaweb.google.com/Ripley44mag/CoinsOfTheAncientWorld#5496549041671267234[/IMG] This is the reason why there is damage to center of many coins. Electro overcooking distortion - [IMG]https://picasaweb.google.com/Ripley44mag/CentralAmericaSouthAmericaMexicoCaribbean?locked=true#5457564902683622370[/IMG] Note distortion and burn at the 8 o'clock position behind the "Z" Zacatas mint mark.[/QUOTE]
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