I'm not sure how that would happen without there being a flaw. Does it appear raised or not? Could be acid or some sort of environmental issue?
It's pretty flush under the Arm, but from the Arm up, is indented to the right of the line, or East Side ....
Yes, this one has me questioning whether it could be environmental. The colors are different enough to make me think it was post strike, but I'm pretty novice in the error collecting realm. If it isn't something super obvious, I'm just guessing. Does a nic-a-date buffalo nickel date look the same as the rest of the coin despite the under portion appearing darker? I ask because the stars do not have the same discoloration.