Are these error pennies?

Now these are 2 different pennies. The pic of the back is a 1966.

 

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77 D IMO is environmental damage not a mint error the 66 IMO is DDD ( die deterioration doubling). JMO
Dave

 

Correct.. Environmental Damage stain
2 well circulated Cents

 

You forget the damage from a coin roll crimper Paddy!
Reed and Sparkles

 

And the damage at the right base of the memorial on the 1966.

 

So the 66 is not DDD?

 

I noticed on the 66 when look at a different angle, I notice it was thicker on one side. Can anyone explain?

 

If you mean Die Deterioration Doubling.. could be. But the picture you provided is blurry

 

Btw, thank you guys for taking your time and reviewing my question. I am of course new to coin collecting and want to be a little more knowledgeable about this subject so I can pass it on to my step son and daughter.