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 Replies: 32 / Views: 2,379 |
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Pillar of the Community
United States
978 Posts |
This one looks like a Greaser. The date and liberty are missing definition similar to a Greaser. After photographing the coin, and upon closer inspection, I noticed the "4" in 1994 is duplicated, RAISED and shifted well to the southeast. This is very clear in the B&W and color close up photos. The shift is significant and far beyond any Machine Doubling I've seen before. Not sure what is causing this phenomenon. Could it be hardened grease on the die with an image of 4? Any ideas?     "We are all flawed, some MD and some PMD." NYI |
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Bedrock of the Community
United States
94367 Posts |
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Bedrock of the Community
United States
19130 Posts |
Grease issue, split plating on the mint mark. Would need to examine the coin in-hand to get a better sense for the date observation.
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Moderator
 United States
95204 Posts |
nice Greaser for sure, not sure about the 4, but extreme split plating on the MM. |
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Bedrock of the Community
United States
73853 Posts |
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Pillar of the Community
United States
2734 Posts |
Yes, this is a case of grease-mold doubling. This extends backward by a year the phenomenon. Is it okay if I use your images for a Collectors' Clearinghouse column?
Error coin writer and researcher.
Edited by mikediamond
09/06/2024 11:07 pm
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Pillar of the Community
 United States
978 Posts |
Grease mold doubling....... That is a new one for me.
Thank you for the insight E&V and Mike Diamond.
"We are all flawed, some MD and some PMD." NYI |
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Pillar of the Community
 United States
1464 Posts |
New one for me as well... Quote:
Grease mold doubling has only been seen in cents dated from 1995 to 2000 Quote:
This extends backward by a year the phenomenon very cool!  |
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Bedrock of the Community
United States
73853 Posts |
You're welcome, NY Islander. Mike is wondering if it's okay to use your images for a Collectors' Clearinghouse column.
Errers and Varietys.
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Pillar of the Community
United States
2731 Posts |
A really nice example of this sort of error, nice find!
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Moderator
United States
56855 Posts |
Wondering how the die fill being struck into the coin would leave a raised digit and not an incuse one? John1  |
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Pillar of the Community
United States
8738 Posts |
Very cool find!
-makecents-
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Pillar of the Community
United States
3535 Posts |
"Grease mold doubling"
Very interesting! ..and great new knowledge to gain!
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Pillar of the Community
United States
2734 Posts |
John1, the process underlying grease-mold doubling is unclear. As you imply, if the process was similar to a dropped filling, the number should be incuse. Perhaps a thin layer of "grease" is pushed out of the number recess and acts as a secondary recess. Why it shouldn't be completely flattened or act the same way as a thin plug of grease isn't clear.
Error coin writer and researcher.
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Bedrock of the Community
United States
10034 Posts |
From: https://www.error-ref.com/grease-mold-doubling/Quote:
Definition: A form of raised doubling that develops in association with "grease strikes". In this form of doubling, die fill of a smooth consistency coats the die surface and fills its recesses. The die fill sets and becomes very stiff as it pounds against many planchets. The layer of die fill escapes from its recess, migrates onto the field, and is struck into a planchet, leaving a raised, slightly enlarged version of the adjacent normal design element.
I admit to being confused by this wording. The hardened die fill "migrates" (falls?) "...onto the field and is struck into the planchet... ." How does a hardened lump being stuck into a field make a raised element? I do not doubt what's being said, I am saying I cannot understand the process with the way I am interpreting the wording. How much squash could a Sasquatch squash if a Sasquatch would squash squash? Download and read: Grading the graders Costly TPG ineptitude and No FG Kennedy halveshttps://ln5.sync.com/dl/7ca91bdd0/w...i3b-rbj9fir2 |
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Moderator
United States
95204 Posts |
Well, this sure is a new one on me! Nice job identifying this Errers and Varietys |
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Replies: 32 / Views: 2,379 |
Posted 09/06/2024 9:33 pm
