Starts at the bottom of the "I" covers the bottom of the "C" and "A" then continues up the rim. I believe it to be a cud because it is covering letters and coming off of the rim and the rim doesn't seem to be pushed in from damage, but it also has chipping which makes me think Deterioration???
If you can follow the crack till it raises and goes over the rim, then disappears into edge, then you have a good chance for a cud.
On this coin you can still see a muted rim. A cud showes no trace of the rim because it has broken away from the die. What you see apears to be the result of a folded fin. http://www.error-ref.com/?s=finning
