The doubling of the date and the ridge through IGWT are both manifestations of die deterioration. Very common.
It's machine doubling, not a doubled die.
Clash marks, most likely.
I would characterize the 1970 cent as minor machine doubling. You can find some major examples in this article:...
The quarter does not have a die break. It has a die crack. It would carry a slight premium.
Minor machine doubling is very common and has no value. Major machine doubling is rare and can fetch prices in excess of $80. Declaring machine...
The first coin is a minor off-center strike. The second coin was flattened outside the Mint.
A very nice group of errors from the same die pair.
I still see only evidence of one strike. The small arc of beads in the otherwise unstruck crescent on the right may be a "stutter strike" caused...
Great errors, but I would contest your diagnoses and descriptions. The first coin appears to have been struck only once and consists of a...
An underweight cent that is otherwise normal in terms of its dimensions and alloy can be attributed to two causes: 1) a cent struck on a split...
Since the details on a hub are raised, there is little opportunity for crud to accumulate within its interstices. However, it's not impossible....
Nice example of a very late die state, Brad.
All I get on enlargement is horrible pixilation. From the most recent set of photos it's now looking like a conventional case of die...
From improved photos I've been sent, it appears that we're only dealing with letter elongation and an extension of those letters onto the design...
There are 4-5 shattered obverse (anvil) dies known among 2007-P dimes. Each incorporates a 50% retained cud. This is one of them.
The damage may be from the feeder finger. Sometimes it takes the form of die dents, sometimes die scrapes, and sometimes a bit of both. The...
It would be subsumed under the general heading of "die wear", "die deterioration", or "die deterioration doubling".
No, I haven't written an article on this topic.
Very interesting. Would you mind sending it to me for study, photography, and a possible column in Coin World? You coin might show a rare form...
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