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What is going on with surface of this 1930 Buffalo?
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<p>[QUOTE="Insider, post: 2542374, member: 24314"]jtlee321 posted: "I really enjoy this." <i><span style="color: #0059b3">me too</span>! </i> "Insider you a very cool guy" <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie46" alt=":facepalm:" unselectable="on" unselectable="on" /><img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie80" alt=":shame:" unselectable="on" unselectable="on" /> </p><p>"...and are fun to debate back and forth with. Here is an image I just made to show how the "luster" from the original un-affected surface and the affected area with the striations is continuous and uninterrupted." <span style="color: #0059b3">As a reflection from a metal surface should be (only different due to the different surfaces). </span>"It is more difficult to see and convey using an image (<i><span style="color: #0059b3">I see it in your photo</span></i>) but under a strong loupe, it is plain as day."</p><p><br /></p><p>"The "luster" in the striated areas is not just reflections on the metal. <i><span style="color: #0059b3">Actually, it is. See comment below. </span></i>Luster is <i><span style="color: #00b359">[caused by the reflection of light from] </span></i>the microscopic ridges in the surface of a coin running from the center to the rims <i><span style="color: #00b300">[in a RADIAL direction] </span></i>caused by the metal being squeezed by immense pressure and forced to flow from the center out to the rims. It's why an uncirculated coin has a cartwheel effect. <i><span style="color: #0059b3">I agree</span></i>. I know you know this, and I want you to know that I know this.[/QUOTE]</p><p><br /></p><p><i><span style="color: #0059b3">Now here is the "rub." There is luster on the entire coin. As you have posted, radials go out from the center to the edges. Note that the striations in the center of the head and the rest of the coin ONLY GO IN ONE DIRECTION - up and down! Therefore <span style="color: #ff0000">they were not caused by the strike. <span style="color: #0059b3">IMO, they are "relics" in the interior of the planch strip occurring as the strip was pulled/stretched in the finishing mill at the mint. They have been exposed in that orientation on the surface and appear as they do because of the action of the chemical on different areas inside the planchet. </span></span></span></i>[/QUOTE]</p><p><br /></p>
[QUOTE="Insider, post: 2542374, member: 24314"]jtlee321 posted: "I really enjoy this." [I][COLOR=#0059b3]me too[/COLOR]! [/I] "Insider you a very cool guy" :facepalm::shame: "...and are fun to debate back and forth with. Here is an image I just made to show how the "luster" from the original un-affected surface and the affected area with the striations is continuous and uninterrupted." [COLOR=#0059b3]As a reflection from a metal surface should be (only different due to the different surfaces). [/COLOR]"It is more difficult to see and convey using an image ([I][COLOR=#0059b3]I see it in your photo[/COLOR][/I]) but under a strong loupe, it is plain as day." "The "luster" in the striated areas is not just reflections on the metal. [I][COLOR=#0059b3]Actually, it is. See comment below. [/COLOR][/I]Luster is [I][COLOR=#00b359][caused by the reflection of light from] [/COLOR][/I]the microscopic ridges in the surface of a coin running from the center to the rims [I][COLOR=#00b300][in a RADIAL direction] [/COLOR][/I]caused by the metal being squeezed by immense pressure and forced to flow from the center out to the rims. It's why an uncirculated coin has a cartwheel effect. [I][COLOR=#0059b3]I agree[/COLOR][/I]. I know you know this, and I want you to know that I know this.[/QUOTE] [I][COLOR=#0059b3]Now here is the "rub." There is luster on the entire coin. As you have posted, radials go out from the center to the edges. Note that the striations in the center of the head and the rest of the coin ONLY GO IN ONE DIRECTION - up and down! Therefore [COLOR=#ff0000]they were not caused by the strike. [COLOR=#0059b3]IMO, they are "relics" in the interior of the planch strip occurring as the strip was pulled/stretched in the finishing mill at the mint. They have been exposed in that orientation on the surface and appear as they do because of the action of the chemical on different areas inside the planchet. [/COLOR][/COLOR][/COLOR][/I][/QUOTE]
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What is going on with surface of this 1930 Buffalo?
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