I am concerned the marks will effect the resell value.
They were stored in mint capsules, in an airtight box with desiccant. Each coin was also in its own mini air tight baggie.
Looking carefully I have seen the same marks on other panders in ebay pictures. They were on pandas of different years to mine.
My coins were placed in a box in 2015 - and removed from box in 2022. The coins were only moved a handful of occasions in that time. I got a panda and gave it x100 more shaking than it has had in my possession and it did not budge. So I dont think they have been slowly vibrating around. But I did see a guy in a YouTube video talking about how micro tremors and even vibrations from large traffic can ware coins in old cabinets. So I could be wrong!
I have my own theory of the cause. I have had pandas of the same year all stored together with other coins, yet only some 2015 pandas have been effected.
I think whatever caused the tarnishing was most likely already in the capsule or on the coin when the capsule was closed. Its hard to see in the photos but when actually inspecting these coins by eye, it looks like the marks are in places where you would grip with your fingers as they are placed in the capsule. I suspect it may be the result of contaminated hands/gloves of the mint worker placing them in the capsules. This is what gives it the impression its leaked in from 2 places.
What do you think looking at yours GBStacking? Do you see it on opposite sides of the coin where you would pick it up? Do you see it where there is the thumb grip on one side, then spread out finger marks on the other? Do you think there could be merit to my theory?
Anyway dipping....
I have been watching some videos on dipping coins. I have 2 maples that arrived covered in finger prints. The prints really annoy me and I have always wanted to clean them, but never knew how to do it without damaging the coin. So I have ordered some dip to try on them.
I am still in 2 minds to if I should use it on the Pandas to remove tarnish, but may try one and see what happens. I dont want to clean/dip coins, but worry these coins will loose their premium if I dont.
I feel like removing the prints is removing damage and I feel better about that, but removing tarnish I am not so sure about.
If I dip a modern coin and it worked perfect, and was completely undetectable that the coin had been dipped, should I inform buyers that it was cleaned/dipped/restored?
To dip or not to dip - that is the question?
Thanks as always for all the replies.