Die Chip. A Cud normally occurs at the rim of a coin. These Die Chips such as your example occurred a lot in Cents minted in the 50's and 60's
Just another way of saying Die Break I want to share this webpage with you - http://www.error-ref.com/cuds/
Let me rephrase: A cud, BY DEFINITION, is a die break that occurs at the rim of the coin (a cud will always touch the rim).
Great link! When you get a minute, could you check your cud Ref. book for this one. I see similar ones out there: http://www.ebay.com/itm/231794180537/?orig_cvip=true&rmvSB=true
3c has "cud" (broken die that affects rim) and area on the othere side where the planchet metal that was "drawn-up" into the cud was no longer enough to fill the design on the other side of the coin. What do the experts call that?
Thank you . it makes is a great "teaching coin" when the "teacher" finds out the correct terminology used by error coin experts to describe the characteristic on its reverse...LOL.