I presume you are proposing that a cent planchet was struck by nickel dies and then struck again by cent dies. This is just about impossible, at...
It looks raised. If so, it's either a die chip, a die gouge, or a sharply defined die dent.
First of all, a cent struck again by nickel dies is not a "mule". It is a "double denomination" error. Second, a genuine double denomination...
Die chips and die cracks.
I confess that I don't see any doubling. Only some distortion of the letters due to die deterioration.
One diagnostic is omitted. On most clips the design rim tapers and fades out as it approaches the clip. Other than that, it's a good summary of...
I would think a lamination error is much more likely. These are much more common than strike-throughs and 3 cent pieces composed of Cu-Ni are...
Annealing softens the die. So presumably the punching-in of letters is done after annealing.
It's not hub doubling (in other words, not a doubled die). One theory is that, in the preparation of a master die, each letter punch is tapped...
The small photos show an unnatural gleam to the coin. A gleam consistent with plating. Of course, it could be a genuine error that was dipped,...
I think it's called "reducing lathe doubling" or something similar. It is said to occur in the production of a master hub. If so, then it would...
It's either a lamination error or a strike-through error (struck through a lamination flake). Only close inspection could discriminate between...
Longacre doubling is not mechanical doubling. Opinion is divided as to its cause. It seems restricted to 19th century coins. I believe it is...
Since it has original mint luster, I would think it's a genuine "black beauty" nickel. As to what causes the black color, opinion is divided. I...
This coin has been damaged/altered outside the mint. A sure indicator is that metal overlaps the motto IN GOD WE TRUST. That's impossible in a...
In the interest of fairness, a number of full-sized, brass foreign planchets are known among Lincoln cents. I have not heard of any among Indian...
It's a spot of subsurface corrosion that raised up a blister and that blister then popped. The corrosion could have been due to an impurity...
This is not true. There are a fair number of full-diameter Lincoln cents struck on foreign planchets. If the planchet approximates the diameter...
Most conventional coin dealers know diddly-squat about errors. I bet none of them weighed the coin, let alone performed a specific gravity test....
A die crack with a few small die chips straddling it.
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