Possible 1964 D Double Die Reverse

MD Notice how narrow the E seems

As explained by many others here on the site- MD happens when the die shifts as it strikes the coin. It will therefore REDUCE the devices. When you have a true doubled die the devices will be wider or enlarged.
Also, MD has a shelf like appearance and will not have split serifs. You can look around the site here and find some very informative pictures demonstrating this.

Here is a side by side:

Note the center image? The image to the left is showing how the MD reduces the image on the upper part of the devices, but note the overall size is normal. The same is the case on your coin. The overall size is normal, but the areas in question are showing the affect on the tops of the devices in a straight line. So it is not hub doubling as hub doubling makes the devices larger, note the example on the right side. So they die that struck your coin was normal, but altered after the strike with MD. On the image on the right the devices are all enlarged on that area of the coin because the doubling is on the die. Thus the term "doubled die." The devices are doubled on the die, making each coin look the same that are struck with that die.