Unmilled 2002 S Roosevelt Dime

And if you happen to have a scale that will give an accurate weight, that would be great. Is it the same diameter as a regular dime?

This edge isn't worn, I do know enough about coin collecting to know,that one. This edge was never milled. Here are the pics. The coin even loos thicker than it should due to Unmilled edge.

Also, same diameter 17.91 and 17.91. Used a micrometer that I have.

I'm struggling to justify this if it's not underweight, and not oversized or undersized.

if it was struck without the collar or with a cent collar, it would be larger, if it were ground down, it would be underweight.

Something is fishy here, and I can't say what it is except your scale must be off or your measuring tool is off. the reeded edge is done at the same time as the head and tails, it's a one step process.
Only way something like this should/could occur at the mint is if it were struck in a cent collar instead of a dime, but it would be larger in diameter and thinner.
and if it was struck without the collar it would be much larger and smashed flat or even curled beyond the design.

this has to have been sanded off and your scale is wrong in my opinion, what you are showing isn't how it should look if it was done at the mint. Even as a Dryer Coin, the delineation of the copper core shouldn't be so even as the reeding gets smashed.it looks like the reeding was sanded off until smooth, maybe wet sanded even., something like that to get the straight line of copper and nickel.

All opinion though, can always send it for grading and see what they have to say about it.

Ok, thought I would ask as I have never seen anything like it. No, scale isn't off, I will double check with micrometer. I think John1 may be right, early stagebdryer coin. Nothing else makes any sense.