1986s cent... Is this die deterioration under the chin

Is this die wear under the chin or something else?

 

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Abe needs a shave.

 

Appears to be. There are other indicators on the letters and number of the obverse, but none on the reverse, so maybe they didn't change the dies at the same time.

 

Since Abrasion doubling has been debunked. I would call that die deterioration doubling.
https://www.error-ref.com/?s=Abrasion+doubling