Thanks Joe, Like everything Woods said if you are looking at the reverse it is called a DDR . Also if you can get a better shot with your phone I use a couple of books or something to lay the phone on to get a close shot. I did look up the 1990-D DDR and there is no reference ,not to say it is not a DDR but without better close ups it may be what we call ( DD ) Die Deterioration or ( MD ) Mechanical doubling, both of these happen in the minting of a coin and can fool the best of us without a good look.