Ok going back to the original coin, consensus or in this coinsensus, indicates that this is a lamination.
Just some thoughts on how this may have come about.
There is a distinct deeper part of the flaw near the II. This makes me think that a piece of slag occupied that spot. This caused a weakness in the metal that during rolling expanded.
The final blow, as it were, was the coin press that finally caused the metal above the slag to lit during minting, tearing back the metal which finally broke of leaving the "tag" near Liz.
The cracks radiating out from the "flaw" could also be explained by the presence of the slag in the original billet.




maybe....
Still a nice addition though however it came about.