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 Replies: 17 / Views: 1,726 |
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Pillar of the Community
 United States
5774 Posts |
1942 P Jefferson nickel Split after the strike Mated Pair- With Mint Grease? I won this pair a little while ago. I don't have an example and wanted this one since it seems to show mint grease on the lamination below and to the right of the P mint mark. It is a greenish opaque layer towards the top of the lamination. Enjoy and please chime in with your experience with mint grease.        Words of encouragement are one of the major food groups.
We need to consume them regularly to thrive and grow.
Edited by Petespockets55
09/30/2023 4:19 pm
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Pillar of the Community
United States
3207 Posts |
I don't know how you're going to prove any discoloration was acquired before the substantial circulation that coin has seen
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Pillar of the Community
 United States
5774 Posts |
Quote:
I don't know how you're going to prove any discoloration was acquired before the substantial circulation that coin has seen Thanks Nick. I agree it will be difficult, but this is more than discoloration. The opaque layer with the greenish tint resembles mint grease I have found on other MS examples. I'm hoping others will chime in with their experiences with mint grease they have found on coins. With my past finds, I have come across clear/white grease (lithium grease?), black gritty grease, and a brown smoother grease or oil. Words of encouragement are one of the major food groups.
We need to consume them regularly to thrive and grow.
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Bedrock of the Community
United States
25229 Posts |
The delamination of this coin occurred post-strike. How would grease at the mint not only have penetrated to the inside of the coin but remained there through extensive circulation?
These discolorations are just corrosion or discolorations picked up long after it left the mint.
Inordinately fascinated by bits of metal with strange markings and figures
Edited by HondoB
09/30/2023 4:38 pm
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Pillar of the Community
United States
5774 Posts |
Thanks Hondo. Have you come across mint grease in your travels? It is more than discoloration though. There is a substance that is visible. Maybe it's not mint grease, but it sure looks like some mint grease I've found. As I understand it, contaminants on the surface of the metal during the mixing of the alloys interfere with the bonding of the metal. The more contaminant there is the larger the lamination can be. This was most likely a "clamshell" coin for quite a while before it split or was pried apart, based on the substantial and even wear on both sides. My thought was that the grease ended up on the alloy as it was being mixed and the grease may have kept the metals from bonding together. The surface of this "lamination" is quite porous, so a void in the metals that would protect the grease seems like a possibility.   Words of encouragement are one of the major food groups.
We need to consume them regularly to thrive and grow.
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Bedrock of the Community
United States
94367 Posts |
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Pillar of the Community
United States
2731 Posts |
Nice pick-up! Maybe somewhere along the way someone applied adhesive to keep it together.
"Pride is yoked with callous behavior, as humility is with compassion." St. Gregory Palamas Top Finds - 1969-S 1c FS-101 http://goccf.com/t/477681 1976 D WQ FS-101 http://goccf.com/t/382777 - 1968 D 1c FS-801 http://goccf.com/t/422254Cool clashed dies - 1972 D 1c http://goccf.com/t/429855&SearchTerms=CCLStruck-In Rim Burr - 1969 S 1c http://goccf.com/t/425587&SearchTerms=burrFloating (Type II) Counterclash - 1978 D 1c http://goccf.com/t/434991&SearchTerms=1978 |
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Bedrock of the Community
United States
74196 Posts |
Awesome pickup! I like it. CoinHI has a good theory.
Errers and Varietys.
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Pillar of the Community
United States
5774 Posts |
Quote:
Nice pick-up! Maybe somewhere along the way someone applied adhesive to keep it together. Thanks and that is a possibility as well. Conversations like all of these are what help open my mind and make me think. I knew this would be a tough cookie to figure out since it was in a slab but I wanted get ideas here because of the depth of experience for the members . In the slab, unfortunately, there's no way to tell how soft or hard the material is. Thanks for making me consider other possibilities. Words of encouragement are one of the major food groups.
We need to consume them regularly to thrive and grow.
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Moderator
United States
96112 Posts |
very cool find - and an attempt to re-assemble it? (Nice theory Coin-hi)
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Bedrock of the Community
United States
25229 Posts |
I like CoinHi's hypothesis. Also, it could be that whatever flaws in the planchet leading to this delamination are simply being exposed.
Inordinately fascinated by bits of metal with strange markings and figures
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Bedrock of the Community
United States
94367 Posts |
I like that theory as well, improbable as it seems.
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Pillar of the Community
United States
6108 Posts |
For what it's worth, I have seen more than one example of split nickels with glue on the split side. No clue why.
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Pillar of the Community
United States
5774 Posts |
Quote:
For what it's worth, I have seen more than one example of split nickels with glue on the split side. No clue why. Thank you TB. That's the kind of insight I was hoping for. Some first-hand experience handling unslabbed ones and input on what this could have been. Words of encouragement are one of the major food groups.
We need to consume them regularly to thrive and grow.
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New Member
United States
35 Posts |
Your pictures are amazing, what do you use to photograph?
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Pillar of the Community
United States
5774 Posts |
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... what do you use to photograph? Thanks. My cell phone with clip-on macro lens for closeups. They turn out decent about 80% of the time. I like the internal software that adjusts for lighting and my inabilities. Lots of manual balancing and tipping the coin on my fingertips to try and get the angle correct for lighting. One downside is that this system usually means lots of images because, with the small screen, it's hard to know if I've captured what I'm trying to show. Words of encouragement are one of the major food groups.
We need to consume them regularly to thrive and grow.
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Replies: 17 / Views: 1,726 |
Posted 09/30/2023 4:27 pm
