of course a much better example could be found, but the beauty of this one is the anomalies,
that said I am not convinced that it is entirely a defective planchet. the large rim ding at 4 oclock and crushed rim at 10:00 lead me to believe that this one had a rough life, and that could be all that is going on.
I agree It is, as you put it, the anomalies that make this one unique.
I do think the ding on the rim looks like it was hit pretty hard, but the "gouges" look like they were there before it was struck. The design looks to flow unbroken right through some of them. Especially the date and on the rigging on the ship.