You were correct in calling it a MAD. That's what it is. However, this is incredibly common. MAD's really only become "collectible" when design elements are missing like these:
The planchet feeds into the coin press with a proto rim(not a fully formed rim). When the coin gets struck, in a collar, the die should strike the coin in the center of the planchet. When the die strikes the coin in the center, and the collar has the coin held solidly a true rim is made with reeding. When the die doesn't hit center, in the case of your coin, it will sometimes produce a false inner rim. So the gap made from the die being off center of the collar let metal flow into the gap to make something that looks like a fat rim with a more defined inner false rim. You can see how the metal in @furryfrog02 pics pushed into a gap between the collar and die. The small cent and nickel shown do not use a reeded collar. For brevity I used collar.
I see no signs of a MAD . But I do see signs of a old collar clash ... http://www.error-ref.com/collar-clash/
