1964-D Kennedy Half Dollar Doubling On Reverse

Looks like MD.
John1

The easiest way I can tell the difference (but I'm far from a pro) is that if it looks like a step, which your coin does, it's MD

The affected areas also show the same color in that area. If it were a doubled die, then there would be a contour happening making the light to dark affect. It is flat shelf like. I don't recall seeing any doubled dies showing this area affected. Same as doubling the outside of bust designs. The right sides are just not affected. More of doen't happen thing, except for Machine Doubling. The only obverse affect on the right side I can think of is the Biggest DDO. The 1955:

Note the slight amount of doubling on this area. But on the outside area of the die, the largest spread is noticed on this die.



So I agree. What you are seeing is Machine Doubling.