1964-P DDR Half Dollar

Machine doubling.
On a doubled die you will see a spread on the centers of the devices. Here is three images. The center one is a rev that is normal with MD on the devices. The top and bottom images are DDRs. Note the width of the devices on the DDR's


When you look at the outside edges of the devices, that is where you will find the common Machine Doubling. But look at the centers of the coins and note when they are wider or taller. That is where to look. Not on the edges of the devices.

That is just a die event. Nothing special unless it flow all the way across a coin. Note the extra images I posted above. That will help a lot.

1964 FS-801 DDR:
https://www.PCGS.com/cert/84385910
Second one
https://www.PCGS.com/cert/27991787
Click on the images and then find the enlarge feature on the upper right side of the screen