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<p>[QUOTE=&quot;cladking, post: 26361566, member: 68&quot;]Most of the packaging errors I ran into weren&#039;t very interesting. Mostly it was missing coins and extra coins.&nbsp; There were some I&#039;d have liked to keep like the wrong mint dimes in the &#039;69 sets.&nbsp; There were lots of &#039;79 quarters where the SBA was supposed to be which was ironic.&nbsp;&nbsp; I never saw it but I heard of a 1970 mint set with &quot;3&quot; small dates in it; two where the S cent was supposed to be and one where the Philly cent belonged.&nbsp; The old packaging was unstable so I cut them all up, including dozens of all-Gem sets, to protect the coins.&nbsp; It really broke my heart to cut the all-Gem sets.&nbsp; One of these was a 1968 set with all spectacular and mostly PL Gems.&nbsp; It was an impossibility with every coin in the top .5 %ile or better.&nbsp; Someone unfamiliar with US coins would have mistaken it for a proof set.</p><p><br /></p><p>Packaging after 1983 is far more stable but if you want to collect intact sets you need to keep a close eye on them.&nbsp; Already 1988 and 1989 packaging is starting to go bad.&nbsp; Five years ago very few coins in these sets were tarnished and suddenly it&#039;s approaching 10%.&nbsp; Store your sets vertically in a dry temperature controlled environment and keep a close eye on them.&nbsp; Pre 1982 sets should just be cut. A few dates like the &#039;73 and &#039;74 are still relatively unaffected but this probably won&#039;t last.&nbsp; A few coins are already toast because they&#039;ve &quot;all&quot; gone bad in the packaging. </p><p><br /></p><p>Before 1980 a lot of sets were assembled manually and some of the most interesting &quot;errors&quot; may be the result of intention. Before this there were more sets with all good or all bad coins.&nbsp; Some of the dogs could be trained to bark.[/QUOTE]</p><p><br /></p>

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