The edge is rolled over evenly onto the obverse of the coin. What is this error and what causes this?
Interesting. Even though I've never seen one just like that, to me it looks like it's been created through some sort of damage to the coin and wouldn't be an error.
Yeah, my first thought was pmd. However, I don't see how someone could do that so evenly - and not damage the reverse. Roll it and hammer it over? BTW, the diameter is the same as another Jeff stacked with it.
I am really curious how that could even be done post mint. The way the rim flows over the letters is something I haven't seen. It doesn't look like a typical dryer coin or spoon job. However, I know nothing about mint errors... or lack there of. Sorry I couldn't contribute any useful information.
I'm with you on all of what you said. If it's a spoon job - it's done very well. And it took some time. I'm hoping someone who knows the minting process can fill us in. It may be impossible for this to happen at the mint - which is what I'm thinking. But if it's PMD - it's weird PMD.
I think it impossible to happen at the mint, based on the pics. It looks as if metal has been forced "over" the minted coin inscription, rather than metal that was there and minted through it. I see no way that it could be a mint error. Rather I think someone has played with the coins, and either forced metal from the rim over in that manner (rims in the second case) or has placed a layer over it and soldered it on.