I have some zombie stuff like that. Apparently the host is carved and then used to make transfer dies.
The erosion causes the dies to be etched with microscopic lines. Light reflects off those lines causing a "cart wheel" effect on BU coins....
They appear (to me) to be under not across the letters. If so, that would be something with the die, such as polishing.
A good example of yes is LaVere Redfield. The Redfield hoard was mostly common Morgans. But Redfield was an off the charts eccentric that coin...
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