I see zinc rot running along the rim. Do you think the raised areas indicated by the arrows are zinc rot getting ready to erupt or die chips or something else? Thanks for any help!
Might be more of a scuff than Die Deterioration: The other devices look fairly crisp. As for the raised area, you can probe it with a sliver of unreconstituted virgin birch (a toothpick -- lol) and if it gives way or flattens, then it's a gas bubble. If it's a solid mass, then it's a small die chip. Based on the shape and that there's a plating disturbance there, I'd vote for gas bubble.
Note the split plating on the rim? It is probably starting to rot under that area. It makes the surface raise in that area and still be firm. (well for now anyway) Eventually it will fall inward.
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