2016 D Is This A DDR Or Is It Machine Doubling

this looks like DDD - Die Deterioration Doubling

I'm sure I've heard coop say that the doubling on these types of dies is almost always in the center of the coin correct me if I'm wrong

More towards the center. But on the Cents the outer devices will be enlarged on the centers of the devices. Machine Doubling affects just the outside edges of devices:



Incuse Devices will be reduced in size:



So on the raised/incuse devices they will be enlarged/reduced depending on the hub doubling. But always on the centers of the devices. (never on the outside edges.

The larger devices will even show even larger (raised) devices:


Note the centers of the devices will show the spread/reduction depending on the raised/incuse devices. Machine Doubling is always affect the outside edges of devices.
All of these images of the DDR are on the same coin. Seeing this coin helped me to see how the raised and incuse devices are affected by hub doubling and also Machine Doubling. This helped me see this a lot better and understand what I was seeing. (If was an educational coin, presented by a fellow member here)

How can you tell the difference between Machine Doubling and hub doubling or die wear?
CoopHome: What areas on the Shield cents can show hub doubling on the design? How is Machine Doubling different on incuse devices? hub doubling enlarges/reduces the center areas of the design on the single squeeze dies. seeing this all of the same coin helps us see the facts on this hub doubling. Machine Doubling dies the exact opposite on the struck coins. Machine Doubling is caused by the machine. doubled dies are created on the die. thus only a doubled die coin will strike a doubled die coin. Machine Doubling can happen on a doubled die, but it is never part of the doubled die, just alters the coins devices post strike. so knowing this information will help train your eyes for the differences.
raised doubled dies will enlarged on the center of the coins devices.


Incuse doubled die devices will be enlarged
Machine doubling reduces the raised devices on one side of the devices. die wear will always show towards the rim direction.


On incuse devices, Machine Doubling will enlarge one side of the devices.
So Machine Doubling and die wear act oppositely on the coins devices, than what happens on a doubled die. Hard to remember, but always remember the areas affected. Doubled dies are affected on the centers of the coins devices. Machine Doubling affects the outer edges of devices. Why? Again because the machine causes the affecting of the outer edges of the devices.

See the differences?

Doubled dies are always affected on the centers of the devices. (enlarging/reducing) Die wear is always towards the direction of the closest rims.

Hope this helps with this discussion.