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<p>[QUOTE=&quot;Vess1, post: 569578, member: 13650&quot;]I have a 1980 proof set that I purchased last fall.&nbsp; I set it out on a desk and left it.&nbsp; </p><p>&nbsp; When I got it, only the penny had some light haze that had formed in the center on the obverse.&nbsp; The rest looked good.&nbsp; May have barely exhibited haze forming.</p><p>&nbsp;&nbsp; Now the S.B.A, the half and the dime all have white haze forming, obverse and reverse.&nbsp; The quarter seems to have toned a different color altogether.&nbsp; &nbsp; I thought maybe sunlight could have caused it but the haze is forming on the backside of them as well, where there is no direct light.&nbsp; </p><p>&nbsp;</p><p>&nbsp;These are still sealed in the mint plastic case.&nbsp; &nbsp; The house temp only changes maybe a couple degrees from time to time.&nbsp;&nbsp; I leave the thermostat set at 70.</p><p>&nbsp;</p><p>&nbsp; Question is, how did this set make it this long without damage and now this?[/QUOTE]</p><p><br /></p>

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