US dime error

2.25 grams

that's a puzzler. 

Huh?

have u ever seen a coin with something like that on it?

Nope. can't explain it at all.

The excessive wear and tear all over it is also puzzling. 

Is that part (with the ear) raised or depressed? Looks raised but pictures can be deceiving.  

Judging from other shadows, I believe raised, like a blister. 
 

So do I. Just want to confirm. I'm working on a “blister” theory.

I can see a picture of the reverse in op..?

So can I (now).

Looks like some dents here:

Hello

Maybe Roosevelt was allergic to hymenoptera😁

I can't think of anything else than a faulty planchet. I don't see what process could have raised it like that .

 What is the diameter - is it the usual size? 

Maybe the circle was where glue was when the coin was stuck to a stick, and then dipped into something. 

Would liquid nitrogen make the coin shrink? 

The circle makes the rest of the coin look slightly smaller in design, so the circle seems larger in design. 

this can happen if a coin is heated. I've seen a few coins like that.

Gavin33

this can happen if a coin is heated. I've seen a few coins like that.

That was my thought. We've seen similar.

https://en.numista.com/forum/topic144441.html

rsirian1

Gavin33

this can happen if a coin is heated. I've seen a few coins like that.

That was my thought. We've seen similar.

https://en.numista.com/forum/topic144441.html

The dime example posted by OP seems different to me. Notice how the raised element follows Roosevelt's upper nose line. Perhaps it's nothing, but it could be important.

I reckon with the possibility that it is a drop of transparent super glue spoiled on Roosevelt's head.

It definitely has a rim like detail

Sorry I haven’t been present for the conversations about this dime I posted. I am here now and can answer and questions you guys have to help ffigure out how exactly and what exactly caused this and if it is rare and or valuable.

The diameter is the same as any other us dime, the weight is  approximately .05g less than other us dimes. The dime actually seems to be a little bit thinner than usual. Here are more pictures

It’s as if instead of it being a raised area where his head is, the area around that spot seems to be thinner than normal which would exp the weight being less than norma.

Thanks for the additional information.  .05g is within the allowable tolerance for this coin (plus some weight loss due to wear). My (current) guess is this coin was put into a hydraulic press with something like a pipe on top. That could also explain the damage on the reverse. In any case, nothing in the minting process could cause this so it has to be defined as post mint damage.

i Disagree 100%. The other side is completely flat other than a couple of Tiny spots where there is some post mint wear/damage, and there is no way that this could be done with anything Like a press bc quite the opposite would be the result. 
How do you figure this could possibly happen with a hydraulic press?

The image on the coin is all there and exactly as it should be and is not distorted whatsoever so that would lead me to believe that this raised area was there before the image was pressed into the coin…

Otherwise how would it be at all possible to raise this area without (1) distorting the image whatsoever  (2) effecting the other side of the coin in some way, or (3) adding weight to the coin..??