Cuds begin at the rim of coins. You have an interior die break. IMO. Not much, if any, added value. Please wait for more knowledgeable assistance though.
You have a die chip there, not a cud. It's a nice size chip as well! No real premium. Nice find though. https://www.thesprucecrafts.com/cud-error-on-coins-768438
They are different, unique and you found it. That is reason enough to keep it. I keep all of mine simply because it adds a personal flavor to the collection and is low cost. Nice find.
I keep everything. I haven't ever sold anything. I don't think I'm getting fired from my job any time soon so hopefully I won't have to sell anything