| Author |
 Replies: 14 / Views: 1,627 |
|
|
Pillar of the Community
 United States
6540 Posts |
    I set this 2000-P Jefferson nickel aside while roll hunting. There is something wrong with the rim that is hard to quantify. The coin on the left is normal, the one on the right is the strange one. This was hard to photograph, although it's easy to feel with a fingernail. The rim isn't raised correctly like a normal nickel. The inside edge of the rim is raised slightly, but as it moves to the outside edge, it slopes away rather than remaining flat. The defective edge is uniform around the whole perimeter of the coin. A normal nickel rim is easy to catch with your fingernail, but it skates easily over the strange one. The edge effect is not dissimilar to a Dryer Coin, but the nickel is otherwise pristine. The bust, lettering, devices are all sharp. Field has plenty of luster. Only the rim seems to have this odd problem. Any ideas? If the coin were beat up, I would say PMD. Maybe some kind of Die Deterioration? It bears a passing resemblance to a thin planchet coin, but unfortunately I don't have a scale that can measure in grams with decimal points.
|
|
|
|
Moderator
 United States
34425 Posts |
@bran, I would go into this assuming that it is mechanical damage, and only give up that opinion if you have strong evidence otherwise. For example, someone could have "broken" the corner on the rim by lightly running this on a belt sander while holding to coin at an angle to the surface.
"If you climb a good tree, you get a push."
-----Ghanaian proverb
"The danger we all now face is distinguishing between what is authentic and what is performed."
-----King Adz
|
|
Pillar of the Community
 United States
6540 Posts |
While intentional damage is certainly a possibility, the irregularity is very uniform along the whole circumference and on both sides. Also, there is no other damage to the surfaces. I don't know how I would rule out abrasion. Possibly by examining the edge under a microscope for evidence of grooves running in the same direction.
|
|
Moderator
United States
96935 Posts |
Maybe it was encased for a time.
|
|
Moderator
United States
56855 Posts |
I have seen that many times before. I do not believe it is PMD. I think we need Mike on this for an actual answer and not a guess. John1  |
|
Moderator
United States
96935 Posts |
you have? Can you remember any topics about this?
|
|
Pillar of the Community
United States
4135 Posts |
I agree with John1, I have many of these in a stash. I always wanted to ask the same question so glad it came up.
|
|
Pillar of the Community
United States
6540 Posts |
I think it might be a candidate for an abnormal upset error. According to error-ref.com, an abnormal upset is typically only visible on an unstruck planchet. Wear or damage to the upset machine can cause poor rim formation during the blank to planchet transformation. One of the presented examples has a convex cross-section, just like this coin.
I would speculate that this nickel has a faint "rim" structure caused purely by the striking process moving metal. The rim isn't raised or squared off correctly because the planchet never had a proper rim in the first place.
That's my best guess.
I will try to get the mass measured accurately this week.
|
|
Moderator
United States
56855 Posts |
Quote:
you have? Can you remember any topics about this? Sorry,no. I still would like Mike to chime in on it.  John1 |
|
Pillar of the Community
United States
1034 Posts |
I've seen this as well on newer uncirculated rolled Jefferson nickels. I didn't think it was much of an error. But it will be interesting to find out what is causing it. |
|
Pillar of the Community
United States
6540 Posts |
Pocket scale arrived today. 4.94g, nothing out of the ordinary.
|
|
Pillar of the Community
United States
2917 Posts |
The mints had all kinds of problems with the 1999 and 2000 coins, especially nickels and dimes. In addition to what you're seeing with the differing rims, you'll also find a lot of them of both years which also don't "sound right" when you drop them, along with others being slightly off-center (2-3% or so). All of these show up quite frequently when you CRH.
CRH Nickeloholic. 1,600,000 nickels searched in eight years! Have found FOUR complete Jefferson sets!
|
|
Pillar of the Community
United States
6540 Posts |
What would cause a nickel to sound wrong when struck?
|
|
Pillar of the Community
United States
5780 Posts |
Possibility of being struck by tilted die(s).
Words of encouragement are one of the major food groups.
We need to consume them regularly to thrive and grow.
|
|
Pillar of the Community
United States
6540 Posts |
In researching prior posts on another subject, I noticed this old post of mine. For posterity, the conclusion was a weak strike that failed to form the planchet's proto-rim into a proper rim. You can read all the details here: http://goccf.com/t/446777#3857862%0A |
| |
Replies: 14 / Views: 1,627 |
|
Posted 05/28/2023 9:11 pm
