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 Replies: 32 / Views: 5,447 |
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Valued Member
United States
322 Posts |
I found a Jefferson nickel in the past with deep ring marks. I was told they were called concentric ring marks. I also found a Lincoln Cent with ring marks on the field that are much finer than the nickels. Are these also called concentric ring marks? Do you guys come across these. Is it worth photographing. Thank you, Mike |
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Valued Member
 United States
306 Posts |
Just a wild guess, but ususally the rings are from a counting machine and are considered damage.  |
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Valued Member
 United States
322 Posts |
Hi. I added a photo. They were difficult to photograph due to my poor lighting.  Thanks,Mike |
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Pillar of the Community
United States
5318 Posts |
That's a very interesting Lincoln! Especially around the date area  It doesn't look like counting damage to me...perhaps lathe lines left on the die?  Let's see what the experts say.  |
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Pillar of the Community
United States
7629 Posts |
That's pretty much exactly what it is. I have had reports of four of these on Lincoln cents, this one being the fourth. I have one myself. ALL for are 1996D.
I would consider the occurrence of this error to be quite rare, and the coins are scarce too.
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Pillar of the Community
United States
7123 Posts |
Never mind I agree with Chucks answer !
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Rest in Peace
United States
1943 Posts |
I have a question about this. If I understand the minting process right, the lathe cuts master hubs. A master hub is used to make a group of working hubs. A working hub is used to make master dies. A master die is then used to make the working dies which then strike the coins. So the lathe marks must come from back at the master hub part of the process and there should be a lot of 1996 D cents with concentric lines from the many working dies that come from a master hub. Is it possibly because the lines wear off the die quickly and this is keeping the number of coins with the lines down?
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Pillar of the Community
United States
1807 Posts |
I have one somewhere. As soon as I find it I'll post a picture.
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Bedrock of the Community
United States
62064 Posts |
I think the problem lies with the material to make the die with. If the lathe marks were to deep and were polished out of the stock, then because they are deeper than the hubbings, they remain. If they were on the master die, then all hubs & dies would have the same markings. If they were on the hubs there were also be several. So somewhere in the process this is happening.  |
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Pillar of the Community
United States
7629 Posts |
Pyrbob - I wish I could answer that, but I cannot. I don't think anyone can.
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Pillar of the Community
United States
3507 Posts |
A master hub makes a master die, a master die makes working hubs, working hubs make working dies. That's a little different than the scenario you posted.
According to Mike Diamond, "A working hub was not polished (or was inadequately polished) after the cone-shaped face was machined. It was hubbed like this and the concentric lines were preserved. Concentric lathe marks are best known from the die pair that produced this 1996-D cent".
At one point, Mike was looking into the same issue on a 1999 and/or a 2000 dated nickel. I don't remember the details on that part exactly. If your nickel is one of those two dates and the lines are very fine like the ones on the pictures of the 1996 D cent, you may have something there:-)
If the circular marks are deep, then it probably is counting machine damage as suggested.
Thanks,
Bill
Edited by foundinrolls
11/22/2008 5:56 pm
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Rest in Peace
United States
1943 Posts |
Thanks for the correction and the answer Bill. I'll have to start taking a closer look at 1996 D cents and 1999 and 2000 nickels. Also thanks Chuck and Coop. Coop, what is the date of the cent you posted?
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Valued Member
Philippines
212 Posts |
Hi I have a 1978 Ike dollar with circular rings too. Are the markings concentric ring marks? I guess it is not caused by a rolling or counting machine since the letters of Liberty and date are not slashed or affected. junjie  |
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Pillar of the Community
United States
3507 Posts |
The Ike dollar does not show the same thing. The Ike shows damage done to it by a counting machine. The scratches would only be in the fields and not across the tops of the letters and numbers if it were lathe lines. Thanks, Bill |
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Valued Member
Philippines
212 Posts |
Okay Bill thanks for the info.
junjie
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Valued Member
United States
322 Posts |
Thanks for all your input and comments. Bill, I think you might be referring to a post that I had a while back. It was for a 1988 d nickel. I tried to find the post by searching, but I couldn't. I've added photos of the nickel. Sorry for the links, but I can't post images on the forum.    Thanks, Mike |
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Replies: 32 / Views: 5,447 |
Posted 11/22/2008 11:27 am
