I am a board member of CONECA (Seat #4) and contribute at least one article to each issue of Errorscope. All three types of "double rims" are...
This is a copper-plated zinc cent. These could be "popped blisters" caused by subsurface corrosion between the copper plating and zinc core. Or...
There are at least six causes for an apparent "double rim". For otherwise normal quarters, the three chief causes are: 1. Slight horizontal...
Certainly it's possible for one of the clad layers to fall off the blank or planchet prior to the strike. But the affected face will have a...
Sounds like a broadstrike (a dime struck outside the retaining collar), and uncentered broadstrike, or a minor off-center strike. They're worth...
I've seen such quarters before. They are a complete mystery to me. The streaks may occur on quarters of a normal color. Abnormally colored...
The coins vary in appearance as the result of the thickness and extent of coverage of the obstructing material. Luster may vary, but the flattish...
It's all the same stuff, just different thicknesses and levels of coverage. Luster may vary, but the flattish design, the persistence of planchet...
And another... http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=3956485371
Here's a more severe example: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=3957383255
The viscous fluid was on both faces, affecting areas of the design and the field. It can be rather patchy in its distribution. These sorts of...
The bottom right coin could be a genuine curved or straight clip. The other three coins are damaged.
This coin is not damaged. It was struck through oil, grease, or a similar smooth, viscous fluid. The stuff often accumulates in the deepest...
Possibly a strike-through error (the narrow curved recess), along with some filled die action.
You appear to have a cent struck on a clad dime planchet or blank. Uncirculated specimens bring around $200 - $250 today. They're a readily...
I just meant that a typical blistered plating error leaves many tiny bumps on the coin's surface.
"Solid" mintmarks are common in most denominations. There are two causes. A die chip may remove the central "post" in the die face, leaving a...
I'm glad you nailed down the cause as a linear blister. "Blistered plating" typically assumes a more familiar appearance of small bumps on the...
Die gouges aren't particularly rare, although they are rarer than die cracks. Just as with die cracks, rarity and value increase with the width,...
Most die gouges have no obvious source. Folks speculate about an accident with a tool during installation. A die gouge is often restricted to...
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