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 Replies: 17 / Views: 1,158 |
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Pillar of the Community
 United States
4038 Posts |
If this is die scratches, it would be due to a tech rotating the die and applying sandpaper or similar to the surface as part of a resurfacing or polishing process. The die has opposite topography vs the coin, so the sandpaper would mostly high points of the die, which are the field and the low areas of the relief. The OP's pictures show scratches on the profile, even on the highest points of the coin such as the ear. This would not happen if this was simply a result of die resurfacing. I'm not sure what the explanation is, and indeed it could theoretically be die scratches, but I can't explain how they would have gotten there.
Edited by rmpsrpms
06/06/2024 4:12 pm
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Moderator
United States
189767 Posts |
Very nice!  |
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Pillar of the Community
 United States
2865 Posts |
Thank you E&V & makecents. @makecents.... Thank you for supplying an accurate description. I wasn't 100% positive because it didn't look right in comparison to the other lathe line cents (1996). Lathe Rings https://www.error-ref.com/lathe_rin...incoln_cent/ Still an oddity to me & in decent shape, so will 2x2 it w/ die scratches. Edited by coin rejector
06/06/2024 4:32 pm
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Bedrock of the Community
United States
94367 Posts |
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Pillar of the Community
United States
984 Posts |
Yea, don't think they are lathe lines either. Lathe lines are very concentric.  "We are all flawed, some MD and some PMD." NYI |
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Pillar of the Community
 United States
8805 Posts |
Ray, here is a post that you made on LCF and Will explaining why they are not lathe lines. For the same reason, I do not think these are either. If you look closely, and the closeup pics, the lines are not consistent, and lathe lines are pretty much perfect. LCF LINK https://www.lincolncentforum.com/fo...-1954-S-Cent-makecents-
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Pillar of the Community
United States
8805 Posts |
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Pillar of the Community
United States
2865 Posts |
makecents.... In comparison to your examples, it certainly looks identical, so I definitely appreciate the info. I'll find a real one eventually, I'll just manifest it into existence, ha!  Edited by coin rejector
06/06/2024 5:00 pm
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Moderator
United States
98039 Posts |
Well what ever they are - good eye on spotting them.
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Pillar of the Community
United States
4038 Posts |
Quote:
Ray, here is a post that you made on LCF and Will explaining why they are not lathe lines. For the same reason, I do not think these are either. If you look closely, and the closeup pics, the lines are not consistent, and lathe lines are pretty much perfect. Yes, but I have changed my opinion since then. I don't think these are lathe lines, but not sure how the scratches got into the depths of the features. Heavy polishing compound pushed into the depths? But still would be heavier on the surface, not the depths. Anyway, I gave in to the die scratch consensus on the 54-S and probably will do so here as well. Contact me for photographic equipment or visit my home page at: http://macrocoins.com |
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Pillar of the Community
United States
8805 Posts |
Quote:
Yes, but I have changed my opinion since then. I don't think these are lathe lines, but not sure how the scratches got into the depths of the features. Heavy polishing compound pushed into the depths? But still would be heavier on the surface, not the depths. Anyway, I gave in to the die scratch consensus on the 54-S and probably will do so here as well. I am a VERY simple man, with simple thinking, so I cannot tell you exactly how it happens, but I am convinced it was done at the mint and they are not from a lathe. Without knowing the different tools they use at the mint to polish and abrade, it is only conjecture on my part and others who have not worked in the mint. -makecents-
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Pillar of the Community
United States
1791 Posts |
I setup and operated lathes as a machinist and lathe lines from a die would only appear in the field. I thought they might be tool marks from the engraving process but the mill doesn't go in a circular pattern that would cause those lines. Depending on how they polish the master hub after milling, those lines could be from that.
I used to make high purity gas valve connectors, The seal surface on the face of the part had to be polished to a mirror finish (less than 10 RA). To accomplish this we used a small secondary operation lathe with a felt pad tool (much like a dremel polishing pad). Turn the lathe on, add a little polishing compound, and the part against the felt pad for a few seconds and done.
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Pillar of the Community
United States
8805 Posts |
Quote:
Depending on how they polish the master hub after milling, those lines could be from that. Not a bad concept but most of the coins minted would show these lines if that were the case. Pretty sure it was done to just one working die, which would still produce many, depending on when in the die's life it was done. -makecents-
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Pillar of the Community
United States
5797 Posts |
I wonder if the die scratches to the deepest parts of the die could be from contamination from "gritty grease" contaminating the die polishing process (on a single die)?
The concentric die scratches can be pretty significant.
Words of encouragement are one of the major food groups.
We need to consume them regularly to thrive and grow.
Edited by Petespockets55
06/07/2024 6:58 pm
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Pillar of the Community
United States
8805 Posts |
Quote:
I wonder if the die scratches to the deepest parts of the die could be from contamination from "gritty grease" contaminating the die polishing process (on a single die)?
The die scratches can be pretty significant. I like it, could be. The areas in question are quite spotty and rough looking. -makecents-
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Replies: 17 / Views: 1,158 |
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Posted 06/06/2024 4:11 pm
