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Message:: [QUOTE="kanga, post: 721053, member: 9270"]Actually I believe there's a reasonable chance that it's a fingerprint, even in that tiny area.The coin is currently in an Intercept Shield album, but used to be in a Whitman album.I had to use considerable pressure to get the coin back into the IS album (I was using gloves this time).I believe I had to use enough pressure so that my thumb would conform to the coin's surface.Between putting it into 2 different albums plus once more when I photographed it, that coin has been handled at least 3 times.At least one of those times I used a piece of cloth instead of a bare thumb. But that leaves at least 2 times with thumb only.I don't think the cloth was contaminated because this pattern doesn't show up on any of the other coins. I'll try some acetone on it, but I think it will need to be replaced.Very low priority, so who knows when.[/QUOTE]