Well this is a tease. You remember when one of your brothers/or sisters had something to show as kids. You'd say: "Let me see it." From the other side of the room they would hold it and and say, see!" Well unless we see the images a lot closer, we can't see what you are seeing. In order to see a DDR/DDO we need to see it this close: DDR:
If you have Machine Doubling it will be flat and remove the contour from the raised devices:
It means Die Deterioration Doubling. As the die starts to deteriorate the devises widen and the metal flows more towards the rim. Another indicator, especially in nickels, dimes and quarters is the bumpy looking texture of the fields around the devices. I too agree that it is DDD.