But the devices are not enlarged like a spread from a doubled die would show. All the areas you are looking at are showing the removal of the devices contour on that area. What
Machine Doubling looks like on all coins. When you look at the outside/inside edges of the devices
Machine Doubling will show there even on a doubled die:

Note these are date images from 4 different big
DDO for that year. Note the dates are all doubled in size? Then note the yellow areas. They are all affected In the same direction, differently on each strike. All doing the same thing. Removing the contour part of that area.
Machine Doubling is cause by the machine. A doubled die is cause by the enlarging on the dies. One is common, one is rare. The premiums are on the doubled dies, the
Machine Doubling is not the same thing. It is causing damage to the devices, This happened a lot on the 1968-1972 cents. Very common to find this.
1. Always on the outside/inside edges of the devices.
2. Always showing a removal of the contour that side of the devices..
3. Always caused by the machine differently from strike to strike.
4. When you look at these areas of the devices, you will find it, but it is a waste of time. Look for the spread in the center of the devices:






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Note that when you are looking at side by sides, they doubling is seen on the centers of the devices. (Not on the outside edges of the devices)





If you look at the outside/inside edges for a doubled die, you spinning your wheels. Look at the centers of the devices. Also good to look at the listing on the sites to train your eyes on what to look for on those years. Grasp at something definite and not just looking for
Machine Doubling. Train your eyes on what to look for on doubled dies.