This. Sorry, but you can tell by the way the Mint Mark appears more smeared at the bottom rather than an exact duplicate of it shifted slightly.
I was looking at the top of the primary D. It has what could be part of an almost completely separate D. Look close to the center of the top of primary mm. Looks like the bottom left corner of a D.
http://varietyvista.com/07 Roosevelt Dimes/RPMs 1954D.htm Doesn't look like any of these. But you have the coin so maybe you might be able to find a match but i can't. I wouldn't argue with Fred.
I couldn't find a match... and I wouldn't argue with Fred either. Thanks to you all for your responses. I'll keep looking.