A die chip would be the likeliest explanation.
I would say that a doubled die is the likeliest explanation for these furrows.
The top dime looks discolored and corroded. The bottom dime was rolled and squeezed.
Definitely acid etched. I've seen many similar coins with the same sort of acid damage, including the recessed copper core.
It's a manifestation of die wear that mainly occurs on copper-plated zinc Lincoln cents.
It is possible to turn a cent almost any color, given the right environmental conditions. The simplest test (unfortunately invasive) is to scrape...
Lots of die chips and a few blind-ended die cracks. The large number of die chips should boost the coin's value at least a little bit.
A die chip. Worth a buck or two.
It's probably just a discolored area left after a layer of dried glue or other gunk was peeled off.
I hope these edits prove helpful.
It is definitely an authentic off-metal error. Although there's some wear on the cheek, I'd venture it's worth close to $1000. As others have...
I agree that doubled dies, RPM's, repunched dates, etc. are die varieties. Cuds, die chips, die gouges, die dents, die abrasion, and other forms...
This form of incuse doubling is fairly common on copper-plated zinc cents and can also occasionally be found on 1943 steel cents. I've never...
Definitely die clash. An incuse impression of the eagles' necks can be seen on the obverse.
I don't know if the Mint has a name for it. Eric Von Klinger of Coin World's Collector's Clearinghouse has given the name "ridge rings" to the...
This is a form of die deterioration. It usually develops in dies that have been striking zinc cents, but occasionally appears in other years and...
Sometimes die deterioration takes very unusual forms. Incuse doubling is one of them. I have a quarter with extensive incuse doubling and I have...
Die deterioration doubling. There is no value attached to this common form of doubling.
Die cracks, most definitely. Given their severity, I would think it increases the coin's value at least a little bit.
This appearance is the result of intentional die abrasion ("die polishing"). The surface was abraded to get rid of superficial damage, perhaps...
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