I can promise you articles on both.
I now have Wes' double-clipped planchet. I am now less certain that these are strike clips. There's no suggestion of a saddle or any typical...
This might be a collar scar. I'll know more when I examine the specimen.
Your nickel has a cud (corner die break) on the obverse. It's not clear to me why the edge might have been vulnerable to damage here, as the...
These vertical striations don't really qualify as false reeding. These may have been generated as the coin was being ejected from a poorly...
I suspect that the reeding on the inside of the clipped edge is the result of a strike clip. Your blank was inserted off-center beneath a newly...
No. All dropped fillings are generated by compacted layers of "grease" (die fill) that detach from the die face and shift position.
After 12 years I finally solved the mystery of this unusual-looking brockage. It was generated by a huge dropped filling derived from the obverse...
In March 2007, Rasputin41 posted images of a 1983 cent with an unusual brockage of Lincoln's bust on the reverse face. I would like to use them...
Mike Diamond, here. I helped you in figuring out your 1983 cent with the unusual brockage of Lincoln's bust on the reverse face. I'd like to use...
The British coin does show severe machine doubling (push doubling subtype).
A combination of chemical and mechanical damage. The plating was chemically stripped and the coin was apparently circumferentially compressed in...
I agree that this is a struck-through error.
I don't drink coffee. Maybe I should start. :)
I just wanted to alert you to some mistakes I made in recent Collector's Clearinghouse columns: In the column on guided die scratches, I was...
A late-stage brockage. This is one of many types of capped die strikes.
Assuming it is underweight, then the coin was most likely struck on a planchet punched out of rolled-thin zinc stock. Among zinc cents, such...
The article that features the brockage from the folded die cap can now be seen in the latest issue of Coin World. I've sent you a copy, Jeff.
The appearance of the lead-off nickel is indistinguishable from an improperly annealed planchet.
The terms "sintered planchet" and "copper wash" refer to theories that were debunked years ago. The currently preferred term is "improperly...
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