I am by no means an expert here but only offering observations of my own based one the provided images.
In the OP's first close up in the opening, where the anomoly meets the rim. There is a void in the scratch/wire, that does not fully extent to the rim. It almost appears that scratch/wire, has been slightly displaced southward where it begins/ends. Leaving an incuse trough corresponding to the width of said anomoly. If this is struck thru an object,perhaps the tip of exacto knife might dislodge it further. In addition, the damage to the rim is much wider than the small path the anomoly follows to the other end. A sharp object scratch across the coin from either direction should appear as about the same width at rhe rim. It is not. The damage @ the rim is somewhat wider and irregular.
Could not on object between the die and planchet originally extended beyond the striking chamber and clipped off by the collar deployment then strike?
Secondly,a later close up from the rim to bust, across the field appears to be a bit lower than the rest of the field creating a slight valley on each side of the anomoly that increases in width toward the rim. Would not an object on the surface prevent an even flow of material during the strike? Also this "Valley " narrows moving to the west. And it just so happens that where the field intersects with the relief of the bust, there is yet another disruption in the continuity of the scratch/wire that corresponds to the direction of the anomaly @ the rim.
These are just questions in my thinking. Maybe I am thinking to hard. But I am not positive that this is
PMD without this one in hand.If so, and I was still questionable, I would go the exacto route. Another chunk pops out, struck thru.

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