I get the basics... planchet is struck and sticks to the die. Next planchet is struck by one die and by the obverse of the original to create the mirror image. But how do you get two planchets in the coining chamber and such a poor strike? That can't be circulation wear... or can it? This is the second one I know of, the other was an AU-50 that sold for $5,800 at Heritage. This wasn't even in the same universe. I'm pretty sure the low grade scared away most bidders. Never-the-less, some clue as to value would be appreciated...
It appears genuine, but at least the Obverse of the coin has had it's surfaces tooled/worked on. It's rare on this denomination, of course, but given condition, I'd guess it's a $350-$500 retail coin, or thereabouts, based on what can be seen in the photo.