1972 Lincoln Penny Double Die Reverse?

Appears to be a very nice example of Machine Doubling on the reverse--not a doubled die.

Note the area you are looking at. Note it is on the outside/inside edges of the devices. That is where Machine Doubling always happens. Sometimes you will see a bounce and it will damage the devices a bit higher that surface. But the area to look for doubled dies, is on the centers of the devices.
Note the differences of locations of doubled die reverses compared with a normal die on a 1983 DDR:

Note where you see the hub doubling. It is on the center of the devices. If you don't see it there, move on to the next coin. When you start looking harder, then you are finding Machine Doubling. For get the outside and inside edges. That is were you will find Machine Doubling. Save your eyes for the real doubled dies, not the machine created doubling that remove the contour of the devices. First clue for Machine Doubling? Take a look again. Note the MD had a 90 degree angle on one side of the devices, because the contour of the coin was removed and reveals that 90 degree angle and the pushed snow look where the metal was, but was moved after the strike. A doubled die, had the doubling the die, thus the term, Doubled Die. Machine Doubling can even happen on a doubled die, as the machine is not partial. It alters any coin when the machine is loose. Machine doubling does not create a doubled die, but a doubled die can have machine doubling.