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<p>[QUOTE=&quot;Howard Ryan, post: 7822151, member: 118722&quot;]So I have proof sets from the US mint from 1957 - 1964. They include Lincoln Penny, Nickel, Drime, quarter and half dollar (Kennedy, Franklin). </p><p><br /></p><p>I noticed that the 1964 set looks proof like in these non-hard plastic holders but the 1958 Franklin half dollar is starting to get spotty and has a small tinge mark that almost looks like PCV mark -- though I do not think they used PVC for US mint sets back then... who really knows. I have the mint sets in an album in the original holders which resemble a large modern day saflip but with multiple sealed sections and not hard like the saflips which got me thinking that they are not that inert. </p><p><br /></p><p>Is it worth putting all these coins in modern inert saflips and sealing them? I&#039;ll probably place the larger half dollars in Quadrum Intercept hard plastic holders.[/QUOTE]</p><p><br /></p>

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