Those cracks should make it easy to determine if it
cast. A
crack is rough and
sharp inside. A
cast of a
crack cannot copy the internal detail. The coin does not look
cast in the photos.
Raised spots like these can be from die damage. Dents in the die produce raised spots on the coins.
The sort of bulge you have in the left
field does often indicate corrosion of base metal within. With those edge splits, if it is a
fourree, I would expect to see some bronze in the cracks. If you don't see any bronze in the cracks, it is probably an official coin. Perhaps the
alloy was not mixed well enough and there is an internal lump of bronze that has some corrosion. Or perhaps it was a dent in the die.