Taking a stab at it
Dstnfx
Posts: 53 ✭✭
Been learning a lot since I started collecting. Found some more doubling on a 1997 penny, so I thought I’d give my own opinion on it. This is strong mechanical doubling on the ONE in one cent. It’s a cool find that I will keep for reference. 
3
Comments
Yes, I agree... Mechanical doubling. A good specimen for a reference set. Cheers, RickO
Yup, MD good reference example
BHNC #203
Welcome to the forum.
Good learning specimen. If you're into varieties/errors, check that obverse. See if the "ear lobe" is doubled. Big well known variety. I have one I found in CoinRollHunting. CRH.
"Jesus died for you and for me, Thank you,Jesus"!!!
--- If it should happen I die and leave this world and you want to remember me. Please only remember my opening Sig Line.Also look for Die Deterioration Doubling (DDD) - sometimes confusing it for MD
http://www.error-ref.com/die-deterioration-doubling/
"When they can't find anything wrong with you, they create it!"
I'd be more inclined to call this die fatigue or die deterioration doubling than machine doubling.
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