According to science, gold does not tone. However, gold alloys used to make coins could tone. I'm not discounting your observations, but...
If you take the time to learn and study the minting process, you'll easily understand why this cannot be a mint error. Coins are struck in a...
More like die deterioration/worn die
Something abrasive post minting. Damage, not an error
Numista works well Your coin https://en.numista.com/catalogue/pieces7721.html Mexico https://en.numista.com/catalogue/mexique-1.html
Looks like somebody paid attention to their organic chemistry. :D
I haven't found any data on the partial pressures of the decomposition products of the plasticizers, but I don't believe it is high based on 35...
Wish I saved them. I used to buy 1/10 th ounce eagles, maple leaves, and the occasional Australian nuggets in the 90s in lots of 10 for around...
Unless you see discoloration in the boxes, I wouldn't think there would be a concern. PVC plasticizer residue is transferred by physical contact...
They aren't similar. The OP is caused by a plating issue and corrosion. Your coin is a solid copper alloy. It looks more like a die gouge as I...
Nice pics of the split serifs/notching
As you're beginning to see, identifying random counterstamped initials can be incredibly difficult. Your best hope is to match the letter punch...
Thickness is not always a good measurement. It can vary on the rims, design and fields depending on die and press set up, striking pressure,...
It's always good to document stuff like that on the flip IMO. There really isn't a premium if the planchet can be traced to a date (as you said,...
The acetone evaporates very quickly, so if there is any dissolved residue/crud in the solvent, it can redeposit on the coin. The multi bath...
Bought it from Anthony Terranova at a show in Baltimore about 10-12 years ago. I always wanted one ever since I saw it in the Redbook when I was...
A nickel is made from an alloy that is 75% copper and 25% nickel. In order to remove the staining and corrosion byproducts, you need to know what...
You are responding to an 8 month old thread and the OP has already posted that the coin is MS62. Nothing wrong with digging up old threads, but...
I am going to ask you where the big S came from, because all errors and varieties can be explained as coming from the mint process. Just because...
The surfaces are corroded. I'm guessing acid, but there is a chance it could be mechanical. The surfaces are rough and the details are mushy,...
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