Agree. @spenser acetone and xylene will loosen/dissolve organic materials like glue, PVC residue, and "schmutz" that sticks to the surface. They...
1980 was the first year the mint started using the P mm on nickels, dimes, quarters and halves. All 1980 quarters minted in Philly have a P mm
Most copper, nickel, or clad coins found detecting suffer some type of environmental damage and rarely have much collector value, so cleaning them...
Zippy Kitty uses the Charleton Standard Catalogue of Canadian Colonial Tokens. She highly recommends it to anybody interested in this field [ATTACH]
@COINWILD why don't you post this on the CU/PCGS forum like you did with your damaged art coins. Or did Heather give you a time out.
I'll go with the half penny. Searched the auction records at Heritage and found a grade and price range that works for me. Time to go looking...
A while back when you first started posting, members recommended that you purchase a copy of A Guide Book of United States Coins (the Redbook)....
Very nice write up. I recall seeing listings for Pitt tokens before, but never paid any attention to them. I love coins with historical stories...
I think the technical term for this is "messed with"
This is corrosion which is commonly known as zinc rot. The copper plating was breached and the zinc is reacting with the environment. A Similar...
Sorry, but it’s only environmental damage. Copper is a very reactive metal and who knows what it’s been exposed to during the 79 years since it...
Executive Currency had a $100 FRN 2006A graded AU55 with a S/N 00000009 listed for sale at $1200 on his 2018 price list. For reference, that's...
Not sure I understand your comment, but overweight/underweight coins that are not PMD are usually caused by a mistake in the strip rolling...
FWIW, I do not see any fractographic characteristics that would indicate that it is a broken part of a larger item.
@Raizac The minting and die making processes are well documented and understood. When you find something unusual you need to ask "how could that...
The special mint set (SMS) coins are only known through coins that were found in the estate of a former mint director. Contrary to the hype...
The reason for buying a slabbed 16-D in lower grades is for authentication. All of the major TPGs should be able to differentiate between the...
Your coin has mechanical doubling. This is not considered an error and adds no additional value. The following website explains mechanical...
We can speculate all day (I think it's heat related), but the bottom line is that the coin was severely damaged after it left the mint. There is...
Minor die chips and filled dies are very common error types. Occasionally, they will occur in an interesting place that allows somebody to try and...
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