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 Replies: 37 / Views: 2,734 |
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New Member
 United States
35 Posts |
If I remember correctly the roll was at a store they broke it open to give me change, and since the 3 quarters they gave me were all the Wilma Mankiller type I thought it was a bank roll, the other quarters had a very shiny luster like unc.
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Pillar of the Community
Canada
6244 Posts |
@Korny: So for the roll you has the answer of provenances. We will wait the weight when will be possible, we have to go to the bottom of the line here.
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Valued Member
United States
426 Posts |
This is 100% a bifacial grease strike thru for sure.
Wouldn't be a low pressure strike etc. bc the Reeding wouldn't be strong it would be weak as the Reeding is added when the strike commences.
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Pillar of the Community
United States
4404 Posts |
Definitely a grease strike in my opinion as well.
I believe that the abnormally tall and thick rims are very good evidence of this. This large amount of grease means there's much more material being struck than normal. This leads to excessive striking pressure that forces much more metal to form to the collar than usual.
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Bedrock of the Community
United States
62064 Posts |
Well if the planchet it under weight, both sides will be affected. It can't be a normal Grease Fill. Note the devices that are incuse, are blocked. They are raised on the die and can't be filled. If the weight is normal, then it could be an over polishing of the die issue. But I'm thinking it is underweight. Edited by coop
03/09/2023 12:25 pm
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Valued Member
United States
426 Posts |
Quote:
. Note the devices that are incuse, are blocked. They are raised on the die and can't be filled. If the weight is normal, then it could be an over polishing of the die issue. Grease could've accumulated along those areas enough to cover the raised (incuse parts on the coin) parts on the die. Also this is certainly not an overpolished die issue at all, the characteristics are not even close to what an overpolished die would look like being struck. It's clear characteristically this took place during striking and the coin being struck thru a thick amount of something which I'll say grease. |
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Pillar of the Community
Canada
6244 Posts |
@ gorham_collector:
The words accumulating grease do not exist anymore in those recent modern coins. The emulsify solution need minus 15 deg. Celsius to become solid and 361 deg. Celsius to evaporate. It is Glycerin base. Been solution and horizontal strike could not accumulate all round. This it is post mint strike done.
Maybe we want to imagine an error but it is not.
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Pillar of the Community
United States
3535 Posts |
Very Interesting. Sorry that's all I got for this one  I've never seen anything like this. |
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Pillar of the Community
United States
573 Posts |
Not a low pressure strike because the reeds look strong and the rims are well developed. Mike Diamond wrote an article for Coin World about the Mankiller quarter with the obverse Cud and reverse die crack: Of note, he had this to say: Quote:For his examination of the first error quarter dollar Clark located, Diamond said, "Lucky collector. These coins have been selling on ebay for more than $300. These images represent the earliest die stage I've seen. The early stages seem to have been Struck Through Grease or maybe they were weakly struck. "It's hard to say which without a shot of the edge. The well-struck area within the Retained Cud suggests it's grease, since Retained Cuds are often less well struck than the surrounding area." Here are two recent examples of the error that sold on ebay: Notice that these two error coins show many of the same features as the OP's coin. Specifically, these two examples show the same device effacement at the rim as well as some of the same reverse effacement of devices. Notice how the WIL is strong but the MA (of Wilma) is very weak on all three coins. Likewise, the KI of Killer is weak, while the first L is strong and the second L and E are weak. There are many more similar weak spots as well. Did all these coins come for the same set of dies? Is it possible this is an early die state of the error coin before the Cud formed? Edited by HGK3
03/09/2023 3:02 pm
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Bedrock of the Community
United States
19158 Posts |
Numismatic forensics at a top-shelf level.
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Pillar of the Community
Canada
6244 Posts |
@ HGK3: I Know this study from Mike. The question it is and Retained Cud will affect the middle of the coin? and only one side middle?, which it is the case here. Do we have to ask Mike to look at this coin? Edited by silviosi
03/09/2023 3:15 pm
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Pillar of the Community
United States
573 Posts |
Sil, Are you saying that it's PMD that affects the middle of one side of all three coins? Is the sample with the obverse Cud and the same device effacement on both side PMD for the flattening but a genuine Cud? What about the sample with both the die crack on the reverse and the obverse Cud? Did someone find that obvious error coin and then intentionally flatten the devices on both sides? |
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Pillar of the Community
Canada
6244 Posts |
@ HGK3: Quote:
What about the sample with both the die crack on the reverse and the obverse cud? I know the tests. I have no idea if they implanted my next quote because in 2021 I finish the contracts (personal states). I think you know the study of 2020. In 2020 we see that will happened if the Dies will not be change metallic or hardiness. Quote:
Alternative Seamless/CoCirculate
Denominations Testing Status/Readiness for
Implementation
80/20 Seamless 5¢, 10¢, and 25¢ Full First Article qualifications of
Mint production and current
supplier capability complete with
external validation by three coin
acceptor manufacturers (CAMs).
Fully ready for implementation
pending legislative authority. 2020 tests and analysis The question for me is how can come out of the testing production. I will receive an original Die very soon and I will perform some tests. If I can still help I will do and not help scammers. PS if you want full report, not the testing I will send you. Edited by silviosi
03/09/2023 4:46 pm
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Valued Member
United States
366 Posts |
When comparing thickness like you posted here, angle and alignment is very important. If the lens and coins are off at all either horizontal or vertical or left or right front to back one coin with look thicker. Plane of view, learned that in mechanical drawing class. Try for a straight and level picture.
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Pillar of the Community
United States
573 Posts |
Sil, I mean this as respectfully as possible: I have no idea what you're referring to. Your original response to the OP's coin was: Quote:
This is IMHO an hand made simulation of an error after Mint Strike. My question is simple - are all three coins with substantially similar markings (the OP's coin and the two ebay coins I linked to) PMD? |
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Replies: 37 / Views: 2,734 |
First Page
Posted 03/08/2023 9:41 pm
