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<p>[QUOTE=&quot;charley, post: 7774734, member: 5372&quot;]There are other issues that can cause an issue with the coin. As to temperature, the outside temperature 95? After one hour a closed condition auto is 140. Outside temp 110? After 2 hours inside auto 155.</p><p><br /></p><p>All metals react to the surroundings. There will certainly be a reaction between the holder and the coin in excess heat conditions, and would have some effect, I would think. </p><p><br /></p><p>The TPGs have discussed this issue on their websites, as I recall. I think years ago the recommendation was 75 degrees storage, but I don&#039;t remember any outside temperature recommendations, other than caution against very large swings.[/QUOTE]</p><p><br /></p>

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