In grading Morgans I find it tough to tell the difference.
I have always heard that O mint marks are likely candidates for weakly struck breast feathers.
However, even an Orleans strike could have started out strongly struck and then have worn down. PCGS
' PhotoGrade uses progressively worn-down breast feathers to decend the scale etc.
Here are my goals:
1) to be able to distinguish between worn and weak and
2) to be able to determine how much of a role %wise the breast feathers actually play in the determination of the grade