Sorry, that's just wear from circulation. Nothing particular but keep searching, you'll find something with keeping soon enough.
It would help if even one of those photos was in focus. My eyes may never recover. However, it looks like the D is filled in? That would be a tiny die chip (since the die is inverted, the hole in the D is a tiny post, and that often breaks off leaving a filed D). The mark under the D is just PMD (Post Minting Damage), which means something banged against the coin hard enough to make a ding. It's a trait of human brains to try to make patterns out of random pictures.