I'm not sure what you mean by noninvasive. Toning on copper and silver coins is formed when the metal atoms at/near the surface of the coin react...
I agree with Chris. It looks like a stain from some type of environmental contact. Not an error
When I was a kid in the 70s, a local dealer got me interested in 19th century type. I always loved the no stars seated issues. For some reason,...
Cuds are blank because a piece of the die is missing. It is not a retained cud. It is simply a damaged coin. It was pressed against something...
Sorry, nothing special. It's a spender
Looks like the die may be a little worn or beat up. See all the lines going from top left to bottom right. They are likely die polish or flow...
Nice find
Sorry, it's only environmental damage, not a mint error
Factual, accurate answers that are short, sweet, and to the point. Coin Talk aims to please :happy: As an FYI, the other 3 members that...
Sorry, but all of the marks you circled are damage. The coin took a few hits in the 61 years since it left the mint
I think the pic from that angle clarifies that it's PMD
If I remember correctly a real coin is pressed into softer metal to form a die. This is then used to strike a few coins. The design gets mushy...
I agree with @SeptimusT IMO, no good will come from trying to remove the oxidized material
And you're old. ;)
Copper plated zinc cents corrode easily. Once the plating is breached, the zinc core can react very quickly with the environment. It is similar...
Are they EXACTLY the same marks, or "sorta look like" the same mark? The mint has a standardized process for making dies and coins. If you learn...
Hopefully, the writing on the slab under the grade comes off without leaving any damage. That could reduce the selling price as well It looks...
Not seeing any evidence of clashing in the fields. Only lots of hits and gouges. @Pete Apple made a good comment above. The highest points on...
It looks like it has the characteristics of a "dryer coin". The rims look like they have been rolled and folded over in some spots and the devices...
Have you been able to match it with any of the RPMs listed on John Wexlers doubleddie.com or CONECAs varietyvista.com?
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