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<p>[QUOTE=&quot;Leadfoot, post: 1605197, member: 2972&quot;]Get a proof coin.&nbsp; Take an eraser, like the one on the end of any pencil.&nbsp; Rub said eraser across the fields of said proof coin.&nbsp; Viola, you have hairlines.</p><p><br /></p><p>Also, said simply, hairlines are dug into the surface of a coin (i.e. incuse), and die polish are above the surface of the coin (i.e. in relief).&nbsp;&nbsp; Another way to think about it is die polish are lines on the die and hairlines are lines that were not on the die.&nbsp; Yet another way to think about it is the coin left the mint with die polish, but someone or something had to make the hairlines on the coin after it left the mint.&nbsp; </p><p><br /></p><p>While not always easy to tell in a photograph, they are easy to distinguish in-hand with good lighting, a good loupe, and a bit of experience.[/QUOTE]</p><p><br /></p>

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