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<p>[QUOTE=&quot;physics-fan3.14, post: 2566564, member: 19165&quot;]I think has more likely been polished with baking soda or some other harsh cleaning method. That will leave the surfaces &quot;shiny&quot;. Interpreting your photos, that mirrored effect doesn&#039;t look natural. One of the biggest keys is to look in the protected areas around the lettering - see how the surfaces look more lustrous there? That&#039;s because whatever was used to clean the coin couldn&#039;t get into the small spaces between the letters. The &quot;mirror&quot; effect is only in the wide open spaces. </p><p><br /></p><p>Also, the rims are rounded. A proof coin will have crisp, square rims.[/QUOTE]</p><p><br /></p>

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