1980 1 Cent Doubling

This is Machine Doubling. Very likely that the coin shifted when it was being pressed, notice that Elizabeth II has the doubling on the top portion of the lettering, much the same as Regina. So the coin moved in a downward fashion in relation to the first strike. It could have moved from sticking slightly to the die or by having some debris under the coin or the die could have shifted slightly.

The repeating of the error is what interests me, trying to find the evolution of the error from the beginning to the end result. Even the smallest die break can, in the end, turn into some big noticeable to the eye die breaks.

With the coins you have found it might have been from a machine that wasn't on a proper maintainenace schedule. A loose bolt could have caused the press to shift just ever so slightly. The die may have worn out as well causing as repeating shift in the coins.

This is slightly off topic but its a good article about Worn dies vs Worn coins. I have found a few nickels with worn dies after reading it.

http://www.celatorsart.com/worndies.html

Is this the double 0 you are refering to or is it normally more pronounced. I had to take two pics to show the full extent of the doubling.

It is easier to see the coin with a illuminated 40x loupe, with a still shot it is diffucult to show the detail. However that does apperar to be exteremly close. Is this a varity?