Rim cud is redundant, because a cud must be a die break connected to rim, by definition: From error-ref: "A cud is a die break that involves the rim and at least a little bit of the adjacent field or design" http://www.error-ref.com/cuds/ Here is a catalog of examples per coin: http://cuds-on-coins.com/
A cud is a break in the die that starts at the rim and moves inwards. Others have thought that fold overs and finned rims are cuds but they are not. Coin cuds definition Cuds Cud en.wikipedia.org on Coins. Cuds. Definition: A cud is a die break that involves the rim and at least a little bit of the adjacent field or design. The vast majority of sizable die breaks are cuds. Cuds can assume a wide variety of shapes including ovoid, crescentic, and irregular.