That would be unrelated to both thin plating and a thin planchet. Nobody is quite sure what causes the starburst effect. You see it every so...
I have one of these thick 1987-D nickels and have seen others. They occur in other years. As Matt said, the coin metal strip is sometimes rolled...
A normal copper-plated zinc cent weighs 2.5 grams. I don't know where you got the figure of 2.62 grams. A completely unplated cent would average...
The terms "die adjustment strike", "die trial", and "set-up piece" are labels that simply reflect wishful thinking. Unless you were there at the...
It's an in-collar, first-strike brockage of the obverse design on the reverse face. A nickel remained behind in the striking chamber and another...
It's a fake. Someone pressed a cent into the obverse face of your cent. These are variously known as "vise jobs", "hammer jobs", "squeeze jobs",...
It's a manifestation of die deterioration. The swollen ridge just inside the design rim is clear evidence of this.
As I said, I have no good explanation at the physical/chemical level. But eyewitness testimony at least shows that the problem lies with the...
That's why it's such a puzzling phenomenon. The sintering scenario would perhaps be acceptable if it wasn't for the numerous underweight...
There is no difference between pre- and post-1982 examples. The two traditional theories amount to no more than wishful thinking, perhaps abetted...
No, that's not what I said, Jazzcoins. Your coin is a dirty, corroded piece of junk.
Actually, the mechanism you describe is a myth. It does not correspond to the physical evidence. 1. There has been no obvious source of copper...
I can't entirely exclude the possibility of a lamination error. What leads me to think it's more likely a struck-through error is the smooth...
As others have said, it appears to be a struck-through error. It is impossible to identify the precise nature of the foreign matter responsible...
There are no splits in the plating here. This is die deterioration doubling, not split plating doubling. For the latter I've used the term...
No. You're just imagining things.
This incuse form of doubling is common on Lincoln cents. It's a form of die deterioration doubling. The other imperfections are also...
First one's a strike-thru error. The second seems to be post-strike damage.
Fred Weinberg will authenticate and describe this error accurately. However, your statement that once a coin is slabbed the diagnosis/description...
I figured no amount of evidence would change your mind. That's been apparent from the start.
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