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 Replies: 24 / Views: 4,458 |
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Valued Member
Canada
219 Posts |
This is the second nickel that I find with these circular markings. Is it due to excessive polishing or something else? Thank you  |
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Moderator
 United States
56855 Posts |
Maybe they are lathe marks? John1  |
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Pillar of the Community
Canada
677 Posts |
Welcome to the forum. I found similar reducing machine lines on the 1965 nickel. Type1- reducing machine whole coin excluding most fields. Type2- lathe lines under head and neck 6 lines. Type3 re polished type 1. Type4 central circle lathe lines,and Type5 left lines behind head over face, front paws over log and in the accused waterlines. Also similar on a 1955 as well. I tried to contact a pro a few months back but error people are very busy and have not responded yet. Good luck in the hunt.  |
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Pillar of the Community
Canada
1472 Posts |
Nice find and very nice photos and details. What year is your coin Numidan?
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Valued Member
 Canada
219 Posts |
Interesting Cownick, I need some clarification on die process. I read that the mint uses the reducing lathe to produce only one master hub. Is this correct or more than one is produced?
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Bedrock of the Community
United States
10045 Posts |
That's interesting! I've found a few lathe line coins from several countries, and the details are very similar to this.
Edited by DVCollector
07/26/2011 2:22 pm
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Pillar of the Community
Canada
677 Posts |
I am not an expert,they are few and far between. Canadians seem to say that it is limited to one or two punch dies. Then when I look at American coin making process, they say it originates from the original matrix. In my observation on all 30 or so, the dies are worn out with little detail on the beaver and heavily polished (widening) incused sections. A guess might be that on such a high mintage, the mint could not produce dies fast enough thus re-working an old die and not polishing it out properly. I thought this was a first for Canadian coins but no-one seems very interested. Anyone have any thoughs.
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Pillar of the Community
Canada
677 Posts |
In an American coin book, PDS, planchet, die, strike. Die with reduction machine lines is used as a marker only no added value.
As far as I know it dose not exsist on Canadian coinage. We know it exists on 1965 and 1955 leading me to think that it is common.
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Valued Member
Canada
219 Posts |
Thank you cownick,
There is still something bothering me. If one master hub (punch die) is produced using the reducing lathe, then all coins produced for that year should have these markings, but it is not the case.
As mentioned, damage done during re-work without proper polishing makes sense.
I will try to find the other types that you have identified.
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Valued Member
Canada
306 Posts |
Hello numidian Some info. for your question, but in french. Quote:
numidan Posted - Yesterday : 10:27 am
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Interesting Cownick, I need some clarification on die process. I read that the mint uses the reducing lathe to produce only one master hub. Is this correct or more than one is produced? http://www.numicanada.com/pieces-de...etape&id=153 |
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Pillar of the Community
Canada
677 Posts |
I just googled coin making process. How do we eliminate the master punch to the matrix? Or how do we eliminate the master dies to the master punch? Numidan, is your coin die example wore out? Most of mine came from BU rolls and they are already poor examples in uncirculated condition.
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Valued Member
Canada
219 Posts |
Both coins are from bullion lots in EF circulated condition. As you can see from the picture, the spacing between the head and shoulder and the elbow to the knee, shows very little polishing done on the die.
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Pillar of the Community
Canada
677 Posts |
Are there lines in the left maple leaf, eye ball,G in KG or C and last A in Canada?
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Valued Member
Canada
219 Posts |
Small lines in the left maple leaf, but none in the eye ball, G, or A.
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Pillar of the Community
Canada
677 Posts |
It could be the same die. I forgot, check for lines around 5 CENTS also.
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Bedrock of the Community
United States
10045 Posts |
I have a 1996 US cent with "lathe lines". It is considered scarce, and a collectable coin. If those lines were present on the master die or hub, I would think it would be a common variety for that year. But what if die blanks were worked on a lathe before impressions were made? If a die blank had some deep lathe lines, would they survive the hubbing process?  Edited by DVCollector
07/27/2011 12:08 pm
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Replies: 24 / Views: 4,458 |
Posted 07/25/2011 4:41 pm
