| Author |
Replies: 13 / Views: 744 |
|
|
Pillar of the Community
United States
6925 Posts |
As I've been examining current nickels under magnification, I have found many examples of this strange little lump. I have started calling it Jefferson's Doorstop. It's a little bump or line on the floor of the right archway. There is a Variety Vista entry for a full-blown DDR version, but I have seen the doorstop so often that I can't believe it is part of any doubling. The VDDR catalog questions whether the phenomenon appears on a working hub or even a master die. My collage includes images from 2022-P and 2023-P nickels, so the lump isn't contained to one year. It doesn't appear on all nickels, but it does appear on many. http://www.varietyvista.com/04d%20J...2PDDR001.htmFor your consideration, Jefferson's Doorstop:  
|
|
|
|
Valued Member
United States
301 Posts |
Greetings, I'm going to go down the Die Chip road on this, based on what you're describing not being on all, but inconsistently on random years and a modest consistency. It is evident on many coins now sporting such involved/ busy designs that a spot of vulnerability exists in certain locations on designs of coins that most are even a given to be found. So I vote fore Die Chip. We wait to hear from others now. 
Edited by Dutch-Tigger 07/07/2023 12:30 pm
|
|
Pillar of the Community
 United States
6925 Posts |
The placement and size are very consistent for a die chip. But it's a possibility.
|
|
Moderator
 United States
108655 Posts |
Well, I think that the door hinges are on the right side, so this could be the daily paper that was dropped off..
|
|
Moderator
 United States
108655 Posts |
I like what Dutch-Tigger said, Could be gouge on the Master Die, and it was re-used for the following year as well, maybe?  Can you post up one full reverse image for reference?
|
|
Pillar of the Community
United States
3207 Posts |
daily paper sounds like a good explanation
somethng that common has to be hub or master related, no?
|
|
Pillar of the Community
 United States
6925 Posts |
I think that's where the Variety Vista guys were going when they tagged the comment: "More research is needed to determine if this is a doubled Working Hub or possibly a doubled Master Die."
Although their example listed is way more pronounced than just this little bit of metal.
|
|
Valued Member
United States
301 Posts |
Quote: Well, I think that the door hinges are on the right side, so this could be the daily paper that was dropped off .  This feels like a better explanation over all the other's.
|
|
Pillar of the Community
 United States
6925 Posts |
So, Jefferson's Morning Paper? 
|
|
Pillar of the Community
 United States
6925 Posts |
Just wanted to update this thread. I ran across this same feature on a 2025-P nickel. So it was still being repeated in the design at least three years after 2022.
|
|
Bedrock of the Community
United States
79863 Posts |
Interesting finds. 
Errers and Varietys.
|
|
Pillar of the Community
United States
1814 Posts |
|
|
Pillar of the Community
 United States
6925 Posts |
Well, I would argue that on two points. First, the object does not appear on all 2023 nickels. Second, I thought that the Mint doesn't even use master hubs and master dies anymore. Don't they just CNC the working hubs directly?
|
|
Pillar of the Community
United States
1814 Posts |
I don't pretend to know how the working hubs are made now but I think there would be the potential for too much variation between them if each were machined. So many factors come into play - slight variations in material composition and hardness, tool wear and deflection, table accuracy (best is .0004"), tood indexing accuracy, even machine operating termp: cold vs. warm. I've worked and CNCs and had to hold tight tolerances.
For arguments sake, let's say a detail it 1/64 deep (.0156"). I would think the potential variation could be about .002". That's a 10% difference and could make a huge visual impact. To give it some perspective, the human eye can see a step in a part that is .0001" different.
|
| |
Replies: 13 / Views: 744 |
|