This is one that has some thought. 1963 D wt. is 3.08g. I believe it is safe to say that no material has been added. I will show a photo of another 1963 D as an overlay and you can see there is material in places that shouldn't be. If someone did this, my hat goes off to them. Thanks for the input.
In order for it to be an error, it must occur during the minting process. Instead of saying, "I think this looks strange and I don't know how it happened, so it must be an error" you need to explain how this could occur in the minting or die making process. The simple answer is, It Can't. Spend some time learning the minting and die making processes and you'll easily come to the conclusion that your coin is PMD. Knowledge is your friend. There are numerous references in the archive posts
When you see something out of the normal on a coin ask yourself, How could this have occurred at the mint during the minting process? I think you will find the answers to most of your questions.
On the reverse, notice how the steps of the memorial look kind of "smooshed" which means someone put a punch/phillips screwdriver on his face and gave it a whack
Trust them Mercy. They have been doing this a long time. Sure, bubbles get burst but hey, I just keep on posting until I get it right. I do have to agree, damage. Welcome!
I was wondering when you would post your avatar photo. Quite the conversation piece and I'd definitely keep it, but as already stated, PMD. How? Why? Those are only questions the person that did this can answer.
I have seen photos of sever internal die breaks in the head area. Have been looking and reading for a long time about mint mishaps. And yes they do happen, very few get out.
But this doesn't look anything like an internal die break. Read and study the following Www.error-ref.com https://www.coinnews.net/2014/01/06/how-the-denver-mint-makes-dies-to-produce-coins/ https://m.youtube.com/watch?time_continue=104&v=mqPvKxJXC_Y&feature=emb_title https://www.usmint.gov/learn/production-process/die-making
No way that would even process through the counting process. Working in banking I can vouch for that. Jams the machines. These members have been collecting a long time. But I have said that before.