I do not doubt you that there are raised areas, RodgerDodger2023. This will happen with the copper plated zinc coins. There will be contamination under the plating, caused by various things that will raise up under the copper plating. Sometimes it's hollow and sometimes it will be solid. The reason I said a fountain was because of the odd, various coloring. This could have happened for a multitude of reasons but is just damage in the end,
PSD.
-makecents-