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A very difficult quiz for the weekend. What caused this characteristic?
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<p>[QUOTE="physics-fan3.14, post: 7783670, member: 19165"]Just so I'm clear we are talking about the same thing - are we discussing the line that starts near the center of the bottom of the middle portico, goes up across the top of the third column, and into the dome to the left of the right-most window? </p><p><br /></p><p>Facts: </p><p>I'd describe it as a thin, irregular line, located in the aforementioned spot. </p><p><br /></p><p>The line is not straight. </p><p><br /></p><p>It is of fairly uniform width, although appears slightly thinner at the bottom. </p><p><br /></p><p>Strong light source from the right side of the picture, and this shows up brightly.</p><p><br /></p><p>Deductions:</p><p>The brightness of the line, given the light source, implies some raised metal. </p><p><br /></p><p>While this is a common spot for die cracks, this mark does not behave like a die crack. See below for a typical die crack in this area (pictures from cuds-on-coins.com). </p><p><br /></p><p>The fact that the line is of the same thickness steers me away from die breaks (those tend to be more variable in width, and more "jagged" - I don't think that's exactly the right word, but imaging the effect of breaking, rather than scratching)</p><p><br /></p><p>The tapering at the bottom leads me towards a scratch - the pressure was less at this portion of the coin. </p><p><br /></p><p>So... that's a long-winded way of explaining why it looks like a staple scratch to me. More clues, or more pictures, may change my mind. </p><p><br /></p><p><img src="http://cuds-on-coins.com/wp-content/uploads/2014/02/20160430_064232.jpg" class="bbCodeImage wysiwygImage" alt="" unselectable="on" /> </p><p><img src="http://cuds-on-coins.com/wp-content/uploads/2014/02/20160430_064149.jpg" class="bbCodeImage wysiwygImage" alt="" unselectable="on" />[/QUOTE]</p><p><br /></p>
[QUOTE="physics-fan3.14, post: 7783670, member: 19165"]Just so I'm clear we are talking about the same thing - are we discussing the line that starts near the center of the bottom of the middle portico, goes up across the top of the third column, and into the dome to the left of the right-most window? Facts: I'd describe it as a thin, irregular line, located in the aforementioned spot. The line is not straight. It is of fairly uniform width, although appears slightly thinner at the bottom. Strong light source from the right side of the picture, and this shows up brightly. Deductions: The brightness of the line, given the light source, implies some raised metal. While this is a common spot for die cracks, this mark does not behave like a die crack. See below for a typical die crack in this area (pictures from cuds-on-coins.com). The fact that the line is of the same thickness steers me away from die breaks (those tend to be more variable in width, and more "jagged" - I don't think that's exactly the right word, but imaging the effect of breaking, rather than scratching) The tapering at the bottom leads me towards a scratch - the pressure was less at this portion of the coin. So... that's a long-winded way of explaining why it looks like a staple scratch to me. More clues, or more pictures, may change my mind. [IMG]http://cuds-on-coins.com/wp-content/uploads/2014/02/20160430_064232.jpg[/IMG] [IMG]http://cuds-on-coins.com/wp-content/uploads/2014/02/20160430_064149.jpg[/IMG][/QUOTE]
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A very difficult quiz for the weekend. What caused this characteristic?
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