1971-D Jefferson Nickel, Please Identify Error Type (New Photos 8/8)

I agree with PSD.

It looks like Post Strike Damage to me. That means that it happened after it left the U.S. Mint.

I take back my wrapper theory. Maybe it is a struck through lamination from another nickel. I do see the "C".

I was wondering if such a thing could happen.
Of course, the addition of a bit of unwanted metal might also cause die to tilt during striking (Crazyb0 suggestion upthread) and/or flow problems, I would guess?

If I wanted to check for glue, I suppose I can see if dissolves in acetone?

Well, I'm at least glad to have posted something that's a little difficult to diagnose

When I saw the image of a C in the last photo, I did wonder if a lamination from an earlier strike could have carried over to this coin (not being experienced enough in this area to know if that's possible). This coin also has a small lamination on the cupola (I think), so maybe there was batch of flawed metal running through the mint at the same time. I suppose that doesn't explain why a corner of the building also got knocked off (the bit circled in orange). That sounds more like die damage?

Finally (again, my ignorance of Jeffersons is showing), the last O in MONTICELLO is completely different from the first.
I don't see that on the small number of photos I have of other Jefferson nickels (though they are all earlier dates).

Thanks very much, EandV.
Certainly that looks closest to the irregular pattern on mine (even if mine isn't as catastrophic ... even minus the Cud).

[quote]
tdziemia asked:
Can anyone explain why this happens during a coin strike? And why Jeffersons seem especially prone to it? To me, this means the metal is not "flowing" (technically, I suppose the better term is deforming) as it should in order to give a smooth surface. More friction at die surface? Inadequate stamping force? [quote]
During the strike the metal is being moved around. Making some parts higher and reducing others to make them lower. After several hundreds of strikes, the lower field areas on the coin, start showing die flow lines. Keep in mind they usually do not use lubrication on the dies. This leaves a residue on the coins. It also gets into the devices and prevent the full strike of them. So this metal to planchet wear will make lines form where the metal is moved over and over into the new location. That is what you are seeing on the fields. Note on your coin, they make the fields to look white in color. This is totally normal. The more coins struck with a die, the more the devices breakdown. This affects all the entire die. Then figure in die clashes that transfer the outlines of deeper devices onto the opposite dies. So to remove these, the polish down the fields of the die. (the fields are the outside part of the die) The devices are deeper into the die and are not usually affected during a clash. Usually the bust outlines and the buildings are transferred on cents.



As the die ages and polishing take place, then the die is altered from the fresh die that started out to an aged, altered die that is continued to be used. Die wear is just part of the lifes process for a die. Die events happen and clashes, cracks, chips, breaks and sometimes a Cud can happen before the die is retired. It is doing the job it was made for.