Poor '55 DDO :(

Well put Ddave. The coin in question could very well be a struck counterfeit or authentic. Unfortunately, it is corroded and worn to a point that makes it impossible to decipher from static photos. The best lesson to be found in this thread and this forum is to stay away unless you are 100% sure of something.
One last thought is that this coin is so ugly it would not fit in my collection anyways. I opted for a nice red poor mans DD to fill that pesky hole in my album.

I normally reserve my opinion on cases of authenticity as it is not my field but Dave made some good points and I will add some points I found interesting.
The environmental damage , to me , has it's good and questionable points. I have enclosed some pics of coins that I have personally dug while metal detecting to illustrate what I see.
On the coin in question the rough areas that I see in the lower protected parts of the coin are not what I would expect from environmental damage. The high spots are rounded and surrounded by vein like lower areas . What I would expect to see are lower rounded pits that form vein like higher areas. My 1909 shows what I would expect to see, though an extreme example.
The part the looks to be expected is the color of the damage at the word GOD. A rust color that comes from the ground leaching out parts of the metal, and that does remind me of the corroded color of my pictured 1928 cent.
I have unearthed a lot of environmentally damaged coins.
Just my observations.

What an interesting thread this has turned into. There are so many lessons from just this thread alone; numismatic, ethical, and otherwise. Just one of the many reasons I am lucky and proud to be a member of CCF.