Quote:
Could it be a rim burr that was struck through?
Not sure.
Here's a definition of Rim Burr:
Rim Burr: This is a form of pre-strike damage to the rim caused by the feeder finger, whereby a portion of the proto-rim is "sliced" or "gouged" up and subsequently struck into the coin face. The burr can be still partially attached to the rim, or can be completely detached and struck into the coin face in any location and orientation.