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<p>[QUOTE=&quot;desertgem, post: 2587921, member: 15199&quot;]Mainstream, the surface condition is one indicator, but when a proof is &quot;impaired&quot;, by circulation , that may become questionable. The primary indicator for a non collector is the edges. Here is a photo where I put an impaired Lincoln proof on another circulated Lincoln. Notice the sharp right angles on the proof ( top ) compared to the chamfered ( rounded edges) of the normal business strikes, The rounding is to allow the coin to be used in coin machine applications and counting . Proofs were intended for display and not rounded.</p><p><br /></p><p><img src="http://i455.photobucket.com/albums/qq279/desertgem/1909vdb/edge-comp.jpg" class="bbCodeImage wysiwygImage" alt="" unselectable="on" /></p><p><br /></p><p>Jim[/QUOTE]</p><p><br /></p>

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