Oh, it will also get more confusing. Let me explain. Your coin is from a
normal die. After the strike happen, the machine/dies altered the fresh strike, like a kick in the shins. This happens very quickly right after the strike. But on a doubled die the doubling is on the die. Thus every coin struck with that die will have the same hub doubling, showing enlarged devices and a spread on the center of the devices, with sometimes notching on the corners of the devices.
Machine Doubling doesn't enlarge the devices, but reduces it when the MD pushes it aside like a snow plow pushes snow. When this happens it looks flat because the contour on that side of the device is removed by the machine. When taking images of this area, because it is now flat, it will reflect back creating glare and in a image you can't see it if the light is spotlighted on the devices:
Note the lower image first. The poster says I see doubling on the devices. Well looking at the image, the glare hides the
Machine Doubling he is seeing. But when I invert the colors, then it stands out on the upper image. What he sees, and what the glare is hiding. All cause by the light to strong on that area, the light reflecting back because its flat and the find not realizing what
Machine Doubling looks like.
Note the image on the left you can see MD that is flat. It remove the contour on that area. Note image on the right. You can see the contoured devices of a doubled die, fully contoured on each of the doubled die areas, with a spread in the center.
So note on the images above. Note on a doubled die, the devices are doubled. Note also the center image that show the size of a normal device is. The image on the left shows the MD area as being a reduction of the devices. That is what you are seeing on your coin. A reduction of the devices, not an enlarging of the devices.
So to get to the confusing part.
Machine Doubling can happen on a normal and a doubled die. Both can be affected.
Why? Because of the cause. The machine causes it. So when we look at a MD doubled die it will look something like this:
Note the 4 images are doubled dies of the 1969-S DDO-001 (yes the big one)
But note the yellow arrows. Those area are affect by
Machine Doubling. The machine damages the devices. But not all of them, just in a direction of movement of the machine. So
Machine Doubling can vary from coin to coin.
Why did he just say that? To show an example of
Machine Doubling from original rolls coins that show the same die marker in each image, and MD that is different from strike to strike.
You see these coins were struck normal, but the machine altered them, all of these images showing in different areas, but always in the same direction. So on your coin you might see one are more affected in one direction and other devices even on the same word, have different amounts of MD:
Note as the devices curve around the design, the devices are not all changed equally. Now if the devices are all in a straight line like on Liberty, then the devices will often be all affected the same:
These are not from the same pair of dies. But shows that devices in line will be affect similar. Hope this helps straighten your thought, rather than confuse you more.
CoopHome:
Machine Doubling affects on devices
Posted 03/24/2020 02:17 am
with GC. No professional appraisal needed. 
to the CCF!
