Posted 11/08/2011 10:56 am
I'd simply call it an arcing, rim-to-rim die crack. "Pre-cud die crack" is also okay, although it assumes it would eventually turn into a Cud, which is not at all certain. It's not a Retained Cud (retained die break) as it lacks any clear sign of vertical displacement or horizontal offset.
Error coin writer and researcher.
