Environmental damage. I ended up having to clean it unfortunately because I saw what I thought was an S and couldn't tell. I got the corrosion off and this is the best pictures I could get
You would be better off taking images under reasonable lighting conditions, and if the results are subpar, then so be it.
Well still looking but I'm pretty sure there's a VDB on the back as well. Which would make it have at least some value, regardless I cherry picked it so still a win in my book
When a piece is this damaged, most collectors won't pay much of anything for it. These days, another factor is authenticity. Although you might think that it's real because you dug out of the ground or something. That doesn't matter. Crooks are now taking counterfeits, marking them up and using that was way to cover their tracks. It's worked a few times, and the third party graders have certified them and put them into "details holders." Many years ago, I was a shopping mall coin show. A guy showed up with an 1877 Indian cent he had found with a metal detector. I looked at the piece, and it was real, but it was very beat up. It had an edge cut and was not round. I would have thought that one of the dealers there would have taken a shot at it as a filler. No one would for $20 when one in Good was selling for over $200. You coin looks like it's been dipped in acid. It's going to be hard selling that for much anything.
One way to possibly tell is to send it in for authentication (not grading). ANAC or another would be the cheapest way to go, IMO.
Sometimes the grading services refuse to give an opinion when there is too little left to be sure of one. They will keep your money, however.
Looks like it has been sand blasted. If it is an S, a $100+ coin is now worth $3-5 to a hole filler collector.