It sure looks like a very faint D to me. OP, if you can take a pic through a high magnification loupe we can probably come to a more exact conclusion.
I wish I could. The only camera I have is the 1 on my phone. I feel it looks like a faint D as well. But I also see what others have said about the faint D and how it should be more pronounced. Like the pictures they shared. I wish I had a better camera to take better pictures with!
A spot? A scratch? An inter-dimensional portal to an alternate plane of existence? I don't know. But it isn't a D.
If familiar with what it should look like, even on a trashed coins, you'd realize it looks nothing like it. Magnification, unfortunately, isn't going to change this and care must be taken not to give the OP any sort of false hopes. A little dig/ding or the like.