Relatively new to being in the hobby seriously. I have an 84 Roosevelt I need some help in identifying the type of error this may be? It looks like a grease strike or weak strike. The overall finish and luster of the coin is uniform and to me it doesn't look like normal wear, but that's why I'm here. I tried a couple of different light types to try and give a better view of what I am seeing. Last, the coin is flat and not bowed or dished.
1. Circulation damaged. It's been through a lot of vending machines. 2. Note the devices are either weak from a Struck Through Grease fill, or enlarged and mushy from extended die wear and creates coins that are normal. After 1973 they DDO's are not happening on the dime design on the obverse. (possibly because of the dimes size, we notice more doubled dies on the larger coins_ on the 1998 and forward, the reverses are showing DDR's again. But you will never find them looking at the old locations. They have moved closer in, to the central areas of the design. The best way to see where to look on the newer coins with the single squeeze methods About the 1996+ area forwards, to see there find them, is to search the listings on the sites and see that is out there to find and where to look. We used to use maps to get where we were going. But the map doesn't talk and it is of no use, unless you look at it and study where you want to go. Same on coin. Look up the information on the sites to see where to find the newer doubled dies. It will surprise you when you see them. Take a look: