I've used the term "split-line doubling" when referring to split plating, but I'm not dogmatic on its use. The DDD in zinc cents is often rather...
I see clash marks and die scratches from intentional die abrasion that was probably done in an attempt to erase the clash marks.
It's a form of die deterioration doubling. The plating hasn't split. And there is no such thing as "plate shift doubling".
You have a small cud and some peripheral die damage, possibly caused by banging against the entrance to the collar at a time when the die was...
Most of these coins don't show percussion marks on the edge, which makes the spooning scenario unlikely. They appear to be rolled and squeezed in...
The effect in both areas is caused by die deterioration.
These are die scrapes, most likely inflicted by a feeder finger.
It looks like glue to me.
I've seen these stripes on quarters and dimes. I suspect they're either marks left by the rollers or by rotating wire brushes used to clean the...
A typical capped die strike. It was struck through a late-stage die cap.
The first two photos are rather blurred, but from what I see this coin was altered outside the Mint. If this was a low-pressure strike, you'd see...
Perhaps so. Still, there's no way to establish authenticity. There are plenty of fake unplated cents in first-, second-, and third-tier slabs.
The first cent is a genuine partial brockage/broadstrike. Value is about $25. The off-center cent is worth two or three bucks.
The one you have photographed is suspiciously bright and I would question its authenticity. Genuine unplated cents are not so reflective.
The only thing Chris Pilliod and Rick Snow have managed to demonstrate is that the "low-leaf" and presumably the "high-leaf" were damaged when the...
This quarter is simply discolored. FYI, there's no such thing as "weak cladding". You can have a thin clad layer, but you'll never be able to...
It's a chipped collar. A type of collar break.
Die deterioration doubling is often present on only one side of a series of letters. For example, the motto IN GOD WE TRUST on pre-state...
It does not make a difference.
It's just normal die deterioration.
Separate names with a comma.
