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<p>[QUOTE=&quot;KBBPLL, post: 26065407, member: 104064&quot;]Just a non-scientific anecdote - I had cents saved in a metal bank from when I was a kid, mid 70s is probably when I put the last cent in there, and left it alone for decades. I finally emptied it out and went through them in 2016. So they had been in there for 40-45 years. Some had really bad verdigris, majority had none at all. Many were still red. If it is in fact contagious, it must be a very slow process.[/QUOTE]</p><p><br /></p>

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