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<p>[QUOTE=&quot;lordmarcovan, post: 3065944, member: 10461&quot;]I think environmental factors like sulfur have something to do with it much of the time, though I couldn&#039;t tell you what specific chemical reactions cause the dark greys on CuNi &quot;nickel&quot; coins like that.&nbsp; (Leave that to the brainy, science-y type folks.)</p><p><br /></p><p>Being the <i>original </i>CircCam guy, I will say that I like it ... until it crosses over that nebulous line into &quot;enviromental damage&quot; territory.&nbsp; That&#039;s a somewhat subtle distinction sometimes.</p><p><br /></p><p>I do like the look on this particular Buffnick and think it&#039;s a subtle CircCam, and I would call it problem-free and attractive (for CircCam fans like ourselves, anyway).&nbsp; It&#039;s not got <i>dramatic</i> contrast, but the contours and relief on the Buffalo nickel design probably wouldn&#039;t lend themselves to a strong &quot;black and white&quot; contrast like we see on some other types.</p><p><br /></p><p>PS- I see what you mean about those smooth reverse fields.&nbsp; That does look a bit unusual.&nbsp; Dunno.&nbsp; That&#039;s a question for the Buffalo specialists.[/QUOTE]</p><p><br /></p>

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