the blue is almost completly covering the obverse besides the half circle under the l in liberty. and the half circle under we. The half circles are normal clad dime color. and the redish spots appear to be something like rust. the reverse is slightly blue but not spread as much as on the obverse . on each side where the clad color turns into blue the outline is spoted whiteish blue but mostly white
if so it wasent direct I baught 88 d&p and 89 d&p for $2 on ebay still in mint cello for my album. the other three are high bu. i took them out of the cello my self
ok then the cello mostlikely had some pin holes in it and letting in bad air like say maybe smoke to the coin.
Toning of a coin isn't a mint error, it is a product of how the coin has been stored in a particular environment.
I would agree either environmental, holes in the cello, or more like that enochian was suggesting, soap. There could have been holes in the cello and the previous owner caused the coloring. Nice coin however!
Just think how coins are made. They go through many mechanical machines, that have a variety of lubricants, cleaners, and such. Now, I have received rolls, packs, and coins.Some were defective in the sets, rolls. Some I sent back ,and they were replaced, others I spent. You can try to conserve them, if you want to try.
