What do you see that makes you think the coin would warrant further investigation?
Based on the appearance, I also feel that it's a legitimate plating error
Its interesting that something with such a high potential value isn't in a TPG sleeve. You would think that the auctioneer would realize that...
The only thing on your coin that's mint related is the filled D mintmark. However this is common on many coins minted in Denver in the 1970s so...
It does look like a contemporary counterfeit but I don't think its tin and charcoal. Probably just some low melting point pot metal. There may be...
https://www.sigmametalytics.com It measures resistivity and compares it to values of known alloys. If you have voids, laminations, or poorly...
@Brandywine I would stop visiting that website. Making the claim that no errors are known for LA quarters is wrong. They said if you find an...
Die chips are very common on America The Beautiful (ATB) quarters. It may actually be harder to find one without a chip ;)
Die breaks (die cracks) are recessed in the die, so they will be RAISED on the coin. The mark by the ear is recessed, so it can’t be an internal...
I think the Sigma Machine (resistivity test) would do a good job on gold with a Tungsten core As @-jeffB mentioned, XRF is primarily a surface...
The XRF and Sigma machine use different principles for measuring samples. Both have positive and negative attributes. Yeah, I would love to...
Still trying to follow the logic on the original post but I'm at a loss for words. [IMG]
Absolutely PMD. The coin has been tumbled around quite a bit resulting in all the surface contact marks and rim that's beginning to fold over....
I've posted these before, but Zippy Kitty enjoys coin collecting (although she gave up on the notgeld coins because she couldn't read German)...
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