Four (4) months after the purchase of this coin (2010 bullion gold sovereign), i took it out of its sealed (I believe it was sealed) blister to store it in a capsule as usual.
By placing it in the capsule and looking at it from an angle, I saw these signs that were not visible or I had not noticed, while it was in the blister.
Do you think this is glue that was in the blister or something else?
Is there a way to clean it without damaging the coin? (meaning that after cleaning it can get a grade and not details cleaned, regardless of whether it's worth sending for grading)
Thanks in advance