Weird toning

[trout]

I just cracked open a 1969 Proof set and found the 1 cent coin had weird toning on the rim and a spot on the obverse, other wise the coin is fine.
All the other coins are pretty much perfect and from my experience with these sets will get a PR69 grade from PCGS .
The one cent coin would struggle to get a PR66 with this sort of damage.
Looking at the coin side on it looks like a dark stripe in the middle of the rim, Has anyone else come across this?
Here are some usb pic's of the rim and a couple of scans of the coin.

[accumulator]

Packaging can't be the problem as all other coins are'nt affected,or you would'nt think so.
It looks raised like something has adhered to it,it that correct Trout ?

[Fulvio]

weird toning on the rim and a spot on the obverse

Looks like a candidate for a split planchet to me. The spot is unrelated I think.

[trout]

Packaging can't be the problem as all other coins are'nt affected,or you would'nt think so.
It looks raised like something has adhered to it,it that correct Trout ?

I am not sure what it is but it only goes around about 1/2 of the coin.
It could be that the blank was inferior or was contaminated prior to striking.
I have opened many proof sets with copper coins in them and this is the first time I have come across this.
I can't be the packaging because I imagine all the other coins would have been affected and the whole rim not just the Centre of it would be affected.

[emu666]

I think the 1c can stay home while the others go on holidays.

[trout]

I think the 1c can stay home while the others go on holidays.

:agreed: