This is a lamination error, although I can't rule out the possibility that a detached flake was struck into the coin.
This is an uncentered broadstrike. The absence of reeding is a natural consequence of such an error.
I see what appear to be incuse (sunken), normally-oriented design elements, principally the top of Roosevelt's head. If this is the case, then...
The Memorial appears to have been damaged after the coin entered circulation. The best evidence of this comes from some of the columns, which are...
Here's an entry on intentional die abrasion: http://error-ref.com/thinning-and-loss-of-design-elements.html
There is accidental die abrasion and there is intentional die abrasion. If taken too far, the latter can be considered an error.
Except for a few recent exceptions, a letter that is smaller and thinner than normal is the result of intentional die abrasion, not a grease strike.
The design rim shows finning on the left. As far as doubling goes, all I see is die deterioration doubling.
An early stage as well. Nice.
This individual contacted me several days ago and I told him the coin was damaged. He's currently offering this specimen on eBay for $250...
As one other commentator has noted, this is a manifestatation of die deterioration.
This may well be an improperly annealed planchet. The term "sintering" is outmoded and inaccurate as there is no fusion of copper dust involved.
Although no overlay was presented, I do see what are most likely light clash marks on the 1976 quarter. Rascal is right that some clash marks can...
The letters "VOS" (from CENTAVOS) represent flattened, expanded first-strike elements. It's a typical effect.
A double strike, with an indent on the second strike.
There can be no doubt that this is a cud (marginal die break). The design rim is gone. What you're interpeting as the design rim is persistence...
I did not confirm this as a doubled die. I merely indicated that I saw what appears to be microscopic doubling on the back of Lincoln's neck. It...
Rascal is closest to the truth. It's an area where the die sank in slightly. The sunken area is flanked by two thin die cracks.
Denali quarter dies get a lot worse than this: http://demo.coinworldonline.com/articles/die-wear-can-render-coins-letters-illegible-o
The three sets of clash marks are easily seen. But your photos are too blurred to tell if they're associated with a Type 1 counterclash. I...
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