1994 LMC Interior Cud?

Thank you for that distinction and clarification, cwb. I went back to cuds-on-coins and compared RIDBs with IDBs. I now see the difference. Very cool. Thanks for that.

And the difference between "chip" and IDB is size? I've read a few times >= 4mm is the threshold guideline. Is that correct?

This is sort of a shady area, some say that smaller than 1 square mm is a chip, some say larger than 4 square mm is a break, some say that a break is connected to a die crack. To me, a die break is usually larger in size and more like a Cud, being connected to the rim where a piece of die is actually broken off. Anything in the middle (not connected to the rim) would be a chip. I'm sure there are some that will argue that, but that's how I see it.

CM, I think it's a break because you have, what looks like, a connected die crack -- as well as Die Deterioration at the tops of the devices towards the rim. There are other signs of Die Deterioration on the reverse, as well: the crack in upper bay #1, orange peel ("elephant skin" -- no offense meant to elephants) in the fields above and below memorial, and a small die chip in lower bay #10. This die has seen better days...

Maybe some gray areas here, but this is what I'm taking -
Details required for Retained
Rim required for Cud
Crack required for Break Edit: Crack is a good sign of break

Here is an image of a cracked die and also a Cud:

Cud:

No, Profiler, I never discount Cwb, he is very knowledgeable, but he said himself that it was a "Shady area". There are many differences of opinion, even among the pros - there just comes a time when a person has to formulate his own beliefs.
You are definitely right about errors being trickier than varieties. I'm a work in progress concerning both.

On the first die I posted, the shows that a crack is on the die that extends to the bottom of the die. On a Cud the area that cracks on the die has broken off the die. Here is a die that has the split die in two pieces:

But when part of the die crack starts crumbling off the die, then we note a chip on the coins struck with it.
Here is what an interior break is: (From Mike Diamonds web site)
http://www.error-ref.com/?s=interior

Maybe this will help explain how a Cud forms and what a die chip is.

The below image is of a 1oz Silver Round with a so-called "Pre-Cud" die break or what I prefer to call a rim-to-rim die break. It's pointed out by the arrows.



Below is the die from which the above silver round was struck but after the chuck of die "outside" the rim-to-rim die crack broke away.



Below is a bronze medal struck from the same die after the Cud formed & a look at the face of the die.



Here is a 1929-D Standing Liberty quarter with a Die Break. In my opinion the term "Die Break" alone is sufficient to describe what it is but others feel compelled to call these "Interior Die Breaks" or the erroneous term "Interior Cud".



The term "Die Chip" simply describes a small die break; maximum size often subjective and/or depending on who is viewing the coin.

The below "BIE" on this 1955-S is commonly described as a "die break" between the B and E of LIBERTY but it actually qualifies as being a "die chip." In effect, calling it a die break is correct but calling it a die chip is being more specific.