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Pillar of the Community
United States
3463 Posts |
This is from a 225th Anniversary Enhanced Uncirculated Coin Set. The frosted area missed the mark!   |
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Pillar of the Community
United States
939 Posts |
Doesn't look like doubling to me.
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Pillar of the Community
 United States
3463 Posts |
I guess I need to explain it better. The coin is minted properly, but the areas where the frosted part of the die are, missed the letters. The coins in these sets are neither Proof coins or business strikes. They were minted at the San Francisco mint using special dies with a frosted finish. The smooth shiny area surrounds the frosted letters on this part of the coin. The frosted part missed the letters a little. EDIT: I also find MD on some of these coins, along with dust, fibers, and something else inside the holder. Some of them have spots, like the Lincoln Cent which is the one coin I wanted in the whole set.  This isn't the only coin in the set where the frost missed the letters. Edited by cwb
12/19/2017 12:45 am
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Bedrock of the Community
 United States
12477 Posts |
It reminds me of colorized coins where the color isn't aligned with the design exactly. It may not be much different as the Mint uses a computer-controlled machine to laser-etch the "frost" on dies now. I found this interesting article on the "frosting" effect over the years from sandblasting to laser-etching: https://www.NGCcoin.com/boards/topi...s-2006-2010/That also links to this: https://www.NGCcoin.com/boards/topi...-proof-coin/Where I found this in the comments: Quote:
The present Micron system is based on the coordinates of features. This is fine for "perfect" dies, but none are really perfect, so you get over- or under-run as shown on the detail images of "20." A while ago someone on PCGS posted a coin with over-riun into the field...I think it was a half dollar. ...which is exactly what your quarter shows, cwb. In Memory of Crazyb0 12-26-1951 to 7-27-2020
In Memory of Tootallious 3-31-1964 to 4-15-2020
In Memory of T-BOP 10-12-1949 to 1-19-2024
Edited by spru
12/19/2017 01:20 am
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Pillar of the Community
United States
3463 Posts |
Interesting links
Thanks spruett001
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Bedrock of the Community
United States
62064 Posts |
I looks like Die Deterioration is affecting these devices. Can't tell for sure as the image is too close to see the direction towards the nearest rim. |
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Pillar of the Community
United States
3463 Posts |
It isn't Die Deterioration, this coin is from the new 2017-S enhanced mint sets. The machine that engraves the frosted look on the dies, didn't line up with the devices. It is a die error, like a doubled die would be, but it's only the frosted engraving missing the letters that creates the doubling. EDIT: I will try to post some more pictures later on, possibly tomorrow. Edited by cwb
12/19/2017 10:38 pm
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Pillar of the Community
United States
3463 Posts |
Maybe this will help explain what I am seeing. The white arrows point to the frosted area. The yellow arrows point to the original device.  |
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Pillar of the Community
United States
3463 Posts |
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Bedrock of the Community
United States
12477 Posts |
Yeah, it's pretty obvious that the die was etched incorrectly. Maybe the die itself was improperly aligned during the process or the coordinates for the etching didn't perfectly match the device positions. The trick will be finding other examples that are identical to yours. I suppose that it could become a new type of die variety.  In Memory of Crazyb0 12-26-1951 to 7-27-2020
In Memory of Tootallious 3-31-1964 to 4-15-2020
In Memory of T-BOP 10-12-1949 to 1-19-2024
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Pillar of the Community
United States
3463 Posts |
I talked to Mike Diamond about this one. He informed me that there are a few known cases of offset laser Proof frosting. This coin isn't a Proof coin, but is made in a similar way. He showed me an even more dramatic example on a John Adams Proof dollar. I guess now we know what to call it.  |
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Bedrock of the Community
United States
62064 Posts |
It is one of the ATB incuse devices quarters. The die is showing age and wearing the raised devices on the die with strong contact. MD
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Pillar of the Community
United States
3463 Posts |
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Pillar of the Community
United States
3463 Posts |
Edited by cwb
01/17/2018 01:08 am
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Valued Member
United States
54 Posts |
Hello guys and gals- Here are some pictures of the same issue.    |
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Valued Member
United States
54 Posts |
I believe cwb is correct. I Don't think this a die problem, I believe it's a laser that applies the frost (luster/cartwheel) that malfunctioned.
Edited by InGodITrust7
10/23/2018 02:45 am
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Replies: 16 / Views: 2,870 |
Posted 12/18/2017 7:00 pm
