How about we use the same term that's been used for 200 years or more - die polishing marks.
I don't know what it is, but it could be it was caused during the edge design process. And that would have to be considered as part of the...
They aren't in the strictest sense of the word, but they are hard to find in higher grades because there were no mint sets issued those years. And...
Look again P.C. - there is an eagle ;)
Separate names with a comma.
