Need help on 1979 Canadian cent...

Found in a roll today. What limited information I have found, says it's a doubled die error. To me it could also be a MD error. Any thoughts?

 

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Possible die deterioration doubling ? See how the outline is wavey in areas and more irregular .

 

Here is a good place to start.
Coins and Canada - Canadian coins price guide, value, errors and varieties

 

Also it is on both sides of the device(s). Normally a good clue for DDD

 

The reference I posted lists a 979 as DDD

 

Yes, when on both sides it is a signature case of Mechanical Doubling.
As in while the coin was struck there was some vibration, creating this appearance.

 

Thank you all... I was leaning toward Mechanical Doubling myself.