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<p>[QUOTE=&quot;1865King, post: 7837019, member: 103207&quot;]Like Johnmilton said above I prefer to buy certified coins in older holders.&nbsp; Sometimes a problem may not show up for a few years.&nbsp;&nbsp; If the slab is over 5 years old your pretty safe to assume that the coin is fairly stable and no unseen spots should show up.&nbsp; &nbsp; I have a 1921 Peace dollar that developed a spot after a few years.&nbsp;&nbsp; It also has begun to tone in an odd manor.&nbsp; I was tempted to crack it out but decided to see what happens over time.&nbsp; It can be hard to tell why the spots show up later but, I suspect faint water droplets from someone breath while handling the coin.&nbsp;&nbsp; The 1871 dime that C-B-D posted looks like something got on the coin either during production or was exposed to some debris in an album or it&#039;s possible that the dime was put in a 2 x 2 cardboard holder that wasn&#039;t wiped off before the dime was stapled into it.&nbsp; I&#039;ve seen &quot;cardboard dust&quot; if left on a coin do this over time.&nbsp;&nbsp; When I use the old stand by 2 x 2&#039;s I make a point to check for that dust.&nbsp; It can be almost impossible to remove these types of spots.[/QUOTE]</p><p><br /></p>

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