nice find Could be a cud break, or a collar error. Looks as though it could be a little oval instead of being round.
Rim cud is not redundant. While all cuds involve the rim there are rim cuds and design cuds depending on whether or not the cud stays just on the rim or if it extends out into the coin far enough to involve part of the design.
Link to S16. http://www.indiancent.com/745-1857-misplaced-dates-in-eagles-neck-snow-16-ms-64-ngc-ps.html
You can have die breaks that involve the design but not the rim, but since the purists insist that in order to be called a cud the break has to involve the edge of the coin, no you can't have a design cud that does not involve the rim.
So not everyone will agree with what Rick called it. I think I'll just call it a blob with feather details on it. What would a purists call it. Just a crack?
Some experts in the error-variety hobby insist that for the blob to be called a cud, the damaged part of the die must include part of the edge of the die. Although this is the purist definition, in the common manner of speaking you'll see the term "cud" used to describe the blob created by any die chip or serious die crack, regardless of its placement on the die or coin.
Collar cud According to Arnold Margolis in his book " The Error Coin Ecyclopedia" pg252 it would be a collar cud. He states" If the liner develops enough weakness so that a portion of it actually breaks away, the coins struck in that collar will have a non-round shape." He shows two examples one being identical to the coin being discussed.
A collar cud or collar break would show a lump on the EDGE of the coin. The pictures in the OP do show the edge of the coin and there is no lump there so it can't be a collar cud.
