1966 Jefferson nickel errors

What type of error is this if it is not doubling or doubled not sure of the correct term. Found this on a few of my 1966 nickel roll marked errors. Also would there be a premium on it?
A world without coins "Chaos"
0
What type of error is this if it is not doubling or doubled not sure of the correct term. Found this on a few of my 1966 nickel roll marked errors. Also would there be a premium on it?
A world without coins "Chaos"
Comments
The shelf like effect is probably md. IMO. Peace Roy
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I am a rookie in laymans terms
A world without coins "Chaos"
MD = mechanical doubling, aka: ejection doubling.
A very very common form of doubling on all denominations,
and part of the minting process. Not an error, and no premium
for it.
Thanks
A world without coins "Chaos"
Good info on doubled die versus mechanical doubling.
http://conecaonline.org/wp-content/uploads/2017/10/StrikeDoublingFlyer-1.pdf
Thanks ...You guys are so helpful...Getting the gist of the doubling v doubled
A world without coins "Chaos"
Good picture... that helps members to identify issues.... Cheers, RickO