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<p>[QUOTE=&quot;dcarr, post: 26372243, member: 4781&quot;]Flow lines are usually radial. The lines on the coin shown are not radial. They appear to be curved. This might sometimes be an indication of whizzing.</p><p><br /></p><p>However, in this case, I think the lines are a form of luster from die erosion. The reason that the lines are on an arc path might be because the coin was struck on a large screw press. The impact of the rotating screw on the back of the die can cause the die to twist a little bit as it strikes.[/QUOTE]</p><p><br /></p>

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