It could be struck on an unplated planchet. Or it could have been plated outside the Mint. You'd have to weigh it to the nearest 1/100 gram and...
A minor horizontal misalignment of the obverse (hammer) die. Since none of the design is cut off, it barely qualifies as an error. Minor...
It does have a finned rim as well. This is a side-effect of the increased effective striking pressure generated by the abnormally great aggregate...
They're not particularly rare. They are much more common than conventional in-collar uniface strikes (two normal planchets struck within the same...
The correct terminology would be an "in-collar uniface strike against a split planchet".
45.4 grains is close enough to the standard 48 grains to demonstrate that the coin is of normal weight and thickness. So hypothesis no. 1 is...
There are several possibilities. The most likely one is that this is a normal-weight cent that was struck through a split planchet. I believe...
Pyrbob's diagnosis is correct. The coin was struck through a late-stage die cap and also indented by a planchet that intruded between the die cap...
It appears to be a piece of "coin shrapnel". It represents the outer margin of a multi-struck coin (probably part of a pile-up), that broke off....
It's presumably a contact mark from the obverse lettering of another coin. It's not an error.
I've seen a number of state quarters with no copper visible on the edge. All were plated outside the Mint. I don't know what a "rub test" is,...
I would have to examine it up close to determine exactly what's going on. From here it looks like a defective planchet or pre-strike damage....
If it's a thick planchet then the weight will be greater than normal. No other indicator is reliable when diagnosing a thick planchet.
Saying "an error is an error" is akin to saying "a coin is just a coin". There are hundreds of basic error types, hundreds of subtypes, and...
The dull color, rough surface texture, presence of tiny bumps, and lack of clarity in the design indicate the copper plating was chemically stripped.
A finned rim does not mean the coin was struck on a thick planchet. It simply means that the coin was struck under abnormally high ram pressure....
Judging from the photos, it appears to be a genuine error. The coin seems to show a "finned rim". Finning results from abnormally high ram...
It's post-strike damage. It appears that a curved, textured implement was pressed into the coin several times, leaving softly defined, curved...
This coin is described on the CONECA website (www.conecaonline.org). It's impolite to steal images from one site and post them on another site...
There is no mechanism by which plating can "shift". The incuse doubling is a form of die deterioration doubling. It is most exaggerated where...
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