1991-D LMC Date Doubling Question

Not a doubled die. The devices are not affected. The fields are showing Die Deterioration wear, making what you are seeing, but just on the right side of the obverse. The left side looks normal? Maybe the MD on many of the previous strikes caused uneven wear on the die. Odd, but not a doubled die.
The devices are all normal in size. If this were a doubled die, you would look at the center of the devices, not on the edges. If it were a doubled die, the devices would be enlarged. Just not seeing that on your coin. Keeper? If you want to show it to new collectors as an educational piece that would be a reason. First time I've seen this.