This 1998-P quarter shown above was struck by a pair of heavily damaged dies.  A large flake of die steel detached itself from the obverse die face, leaving a dumbbell-shaped, rim-to-rim cud.  This cud was almost certainly produced by the same impact or impacts that damaged the dies.  The cud overlaps and hides a very wide line of separation that formed between the intact portion of the die and a retained cud that houses the last two digits of the date.