Sorry, but I don't see anything that could be construed as an error. And the reverse features Monticello, not any sort of "memorial".
NGC blew it, in my opinion. It wouldn't be the first time. None of the grading services are particularly reliable when dealing with...
The second strike was from a fantasy/counterfeit die. Many such double strikes pop on eBay with regularity.
The collar was not broken. The collar was fully intact. It simply wasn't fully deployed and it was pushed further down as the expanding coin...
The stepped line and the upward-sloping perimeter are part of the same error -- a broad die dent. The step marks the edge of the die dent. I...
It's certainly not post-mint damage. The grading services have a habit of over-counting (and sometimes undercounting) the number of strikes a...
I see no persuasive evidence that the coin was struck more than once. The sloping edge with smeared reeding is simply evidence that the coin...
It's a late-stage brockage.
Both dimes in this thread were damaged outside the Mint. The first dime's perimeter was crushed while the second dime has its perimeter ground down.
The dent is from one side of the wrench-shaped feeder/ejector. http://www.error-ref.com/?s=impingement I have photos of a double-struck 2004...
This is die deterioration. The term you were thinking of is "grease-mediated radial smear". Here's an example:...
The cent has a rim cud. The nickel shows post-strike damage.
Acid damage. I've seen many examples of the years. The "oreo cookie" edge with "scalloped" reeding is characteristic of this type of damage.
The 1945 cent shows a form of die damage found in cents from 1917 - 1945. These are usually bilateral and take the form of dents, areas of...
Die scrapes, possibly from a feeder.
These might be roller marks, but the coin is in such bad condition that I can't rule out environmental staining.
The weight is spot-on for a quarter struck on dime stock. This is a rare date for such an error, so hold onto it.
They are unusual looking, but the size and resolution of your photos is inadequate to make a diagnosis. Usually solid corrosion domes are...
My article on this half dollar, and other coins afflicted with the same pattern of smear, can now be found in the latest online edition of Coin...
A radial pattern of doubling/smearing is inconsistent with machine doubling. Perhaps the entire effect is related to the presence of grease....
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