Looks like they might be die chips, unless the metal has been 'pushed' around...hard to tell from the photos; I see some surface marks in the...
The OP photo (not the NGC coins) shows a machined coin. Not an error of any normal or exotic type......
It's had the rim filed - probably to take some silver away, or possibly just damaged from some other source. Not an error.....sorry
There are also counting machines/rolling machines that put that kind of 'reeding' on the coin if it gets jammed in the machinery. Not an error,...
Well worn, and might have been 'flattened' a bit in it's earlier life, based on the damage on the obv. Not an error, sorry
It's contact from another coin. The edge if the coin has stars on it, and another coin 'hit' your coin in that cheek area.
Yes - PMD - no doubt about it.
within tolerance.......no big deal.
Worn/overused dies. A common effect, especially on Lincoln Cents in the 1940's & 50's. After striking a few hundred thousand coins or so, with...
Mechanical/ejection doubling. Not a doubled die - sorry....
check and see if they went from copper to a bi-metallic coin between those two years. If not, I'd say the copper piece might be copper-plated.
looks like mechanical/ejection doubling on the MM.
What's the year of the 'copper' coin?
Tolerance for a copper cent is .13 so your cent is a bit overweight. 3.1 + .13 = 3.23 would be within tolerance Your coin is .31 of a gram...
I can't wait to 'understand...without a doubt' I know what I understand, without a doubt, but I'm not sure what you think we'll understand,...
Chemically treated, AKA 'acid treated'
Definitely has a nice premium over a silver Quarter - I haven't heard of a Twenty Cent Piece being found 'in change' like that in this Century !...
Hard to tell from the photos, but it might also be the copper coating 'splitting' apart - a very very common occurance.
"Is that an error coin in your pocket, or do you just like to post anything you find there?"
environmental damage to the surfaces of the coin. It happens more often that you'd think - liquids, washing machines, etc. etc. can cause it....
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