Small Die Chips.. I wouldn't call them CUDs A CUD would also affect the Rim which is not so on your Nickel
So Mr. Stevens is wrong. (I've seen other things on that site he has called cuds which aren't cuds, or even errors.) On this coin the die has chipped with the chip going into the letter and leaving a thin line of field metal between the letter and where the field drops off to the area that creates the rim. So the chip does not involve the rim and it is not a cud. It is also not a rim cud because those are created by chipping of that lower area around the circumference of the die that creates the top surface of the rim. So it's not a rim cud and it is not a cud, it's a die chip.
No, Mr. Steven's is right, I was wrong in understanding my communications with him. He said this coin is an earlier stage of the cud that hadn't expanded to the rim above the T. So, the mistake was mine.
I submit that an early stage of a cud in the area in question on your coin given the photos you've posted clearly shows a die chip that after continued use turns into a cud.
So he says it's a cud that's not a cud yet. In other words a die chip. Or if you want to be generous a very small internal die break.