2007-D John Adams $1 rotated 180°

[floffykinz]

I was reading up on this after I randomly found this coin in my pocket. No idea where I got it, might have been change I received. I was wondering if anyone could give me more information on the grading and whatnot. I'm not into coin collecting, but after I found this one, I figured I would check it out. And that's pretty much as far as I've got. There's no edge letter errors, or anything else. It's just that the backside is rotated 180° (medallic is the term I found while researching). The coin in the picture is flipped horizontally. Of you flip it vertically, then the two sides are both right side up. I would appreciate any help or information I can get. Thank you.