Just curious, where is the DDO that you are seeing? The pictures are too far away to see. The coin is pretty worn. Are you sure it isn't just wear from 70+ years of circulation?
I still see nada. The mark to the right of the U 'could' (emphasis added) be PMD. the S & T, reserved comment. Not sure
I see it. It is 1DO-001, which is tougher to identify in circulated condition. There is some verdigris or something around the letters though, which could impact the value. Maybe $20-40.
In my opinion, no. The grading would probably cost as much as it is worth, so if you want to make a profit on it I would sell it raw.
I agree as well, the second pics show what the first did not. As for it being variety 1-0-1 or 2-0-1, that is too hard to distinguish based on the pics since they are both the same except for one being a bit stronger than the other.