Possible Cud, But Not Sure...1948-D LWC

Coop, normal rim, no damage.

Assuming it is a Cud, it seems small enough that it may not noticeably weaken the reverse devices.

Exactly.

A different way of saying the same thing I guess. Just I don't think of it as less pressure applied, but more of an issue in the way the material is displaced.

Displacement of material. If metal flows into an unexpected void such as an enlarged border or no ceiling, it is unable to push material back (back flow) sufficiently in the opposite direction. Thanks, Doug.

I see a bit of weakness on the rim area. But the mark between the 'T' and 'R' on TRUST makes me think it is a struck through debris. Can you see under the area in question? If it is not attacked under the side where the 'E' on WE is, I mean clear down to the field, I would think it is a struck through error. A Cud would rise higher than the rim and the edge, where the missing part on the die would be. If it can be lifted, then I would say debris. But it is solidly fixed to the coin, then a small Die Cud. (it looks like it folds over the rim and edge)

If it were a die chip, then that would be considered a Cud as it is on the edge of the die. But here is a small Cud on the edge of the die and it raises higher than the rim.

On this coin we see the opposite happening. But looking at the area in question on the OP coin, it looks like a contact mark on that area. (I just noticed this a minute ago) It might have been damaged during circulation or a counting machine may have flattened it? I just wish I have a view closer to see what the bottom edge looks of the area in question looks like on this one. If it were a Cud, it would be firmly attached to the coin. But the images don't show me that yet. The new images are helpful.

That is what I though it was. Keep in mint this is a copper planchet, not a zinc planchet. So it would not be from rot, it would be that it peeled away from the coin.