There are very few
DDO's on dimes since 1972. So the affected areas you are looking at is called
Machine Doubling. Move post strike that altered the devices when the die was raised.

1. Note on this example the movement of the machine was all in the same direction.
2. The affected areas are showing a removal of the contour of the device on each device on just one side of that device.
3. On a doubled die the devices are enlarged on the centers of the devices, not on the outside edges of the devices.
4. On the post 1999 dimes, they used a different die creation process. On this setup, the doubled dies are in different locations than where you are looking. (Like looking for the motor on that car that has the engine on the other end of the car) These single squeeze dies have the hub doubling towards the centers of the designs. On the
DDR's the hub doubling is now where and not looking what you think you should be finding. So take a look at the listings to see what you should look for?
http://www.varietyvista.com/07%20Ro...Listings.htmBest to take some time and study what each listing for the different years/mints. But think outside of the box: "If it happen on one year, could it be repeated and be a new listing for a different year that has not been found yet. So you might like to make copies of the affected areas and make a study book to have this information on your computer. Then you can learn where/what a doubled die could look like and when they are found by you, you can match or submit here possibly a new listing for these
DDR's. Make yourself a quick reference of this information. Why look blindly, when your eyes can be trained to find what really is a doubled die? (but it is your choice) The more you know, the more you will find. Going blindly will find die damage/die aging/damaged coins. Think about it?