I haven't seen one quite like this, but it appears to be a very late state of die wear, VLDS. Often, you will see what is called a "ridge rim" around the perimeter caused by metal movement during striking that wears down the die on the periphery. This is probably the most extreme example I've seen, if that is what it is.
It looks pretty interesting, so I don't know whether it is desirable to anyone or not. Generally, this type of die wear is not collectable.
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