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 Replies: 10 / Views: 2,618 |
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Pillar of the Community
United States
5239 Posts |
I found this 2001 D LMC that is extra thick and weighs 2.5g and is exactly the same thickness and rim squareness as a proof cent. It also has the same mirror finish as a proof except for the frosting on the lettering, bust and memorial on the reverse. I have included a side by side with a 1998 S proof cent as well as a side by side with another 2001 D LMC. Insight as to whether this could possibly be a proof planchet and if so how could it have been minted in Denver? I've seen square rimmed Lincoln cents and have a lot of them but NOTHING like this.     Edited by Jim0815
04/05/2018 9:41 pm
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Rest in Peace
10197 Posts |
It could just be a first series run on a brand new die with all the factors firing on all cylinders...not the standard it seems for the US Mint!. A fully adjusted die set and correct pressure gives the equilibrium needed for uniformity. Note just how far the details are from the rim, no die flow has taken effect yet for these to begin to migrate outwards, the letters are crisp and yes the rim is sharper than a normal run, I have also noticed that before, could have sworn it was a proof. It can't be a mixup, wrong die to Denver, they stopped making all the dies in Philly by then. That's why I say a brand new die, the first couple hundred made before wear set in, polishing needed and adjustment to the die holders. I remember last year sending one to a fellow CCFer saying "Look at this, a proof"!
Edited by Crazyb0
04/05/2018 11:05 pm
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Pillar of the Community
United States
3655 Posts |
 Cent planchets for the Denver mint are outsourced to Jarden Zinc Company, which is actually the successor to the company that made Ball Mason jars. They arrive as finished planchets, and are struck without annealing. In 2001, Denver was still using the Bliss presses, which vertically struck four coins at a time. The different die pairs could have widely different lifespans. (I think Denver switched to the horizontal Schuler presses in 2004 or 2005. The switch came after the 2004 Wisconsin quarter debacle.) The older Bliss presses could handle a wider tolerance than the Schuler presses. My guess - and it is only a guess - is that the contractor was allowed slightly greater planchet tolerance before 2004 or 2005. The combination of the thicker planchet and a new die pair likely explain your coin. Many of us in the Front Range noted the mirror-like surfaces of the new Denver Zincolns in the late 1990s and early 2000s. I recall seeing some variance in the thickness back then, but not as great as your coin. Edited by fortcollins
04/05/2018 11:51 pm
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Bedrock of the Community
United States
62064 Posts |
During the 1997-2000 era the edges were taller. You could feel the differences even through a 2X2. But it is just the rim that was affected. Just normal weight. Not proofs. But this did not happen to all of them. Just a few I found in OBW rolls. I saved a few, but no premium attached to them.
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Bedrock of the Community
 United States
12477 Posts |
@Jim0815
Can you clarify what coin is which in the last two pics?
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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Moderator
 United States
56855 Posts |
Not a proof. The wide edge is usually the result of a bit too much pressure during striking. John1  |
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Pillar of the Community
 United States
5239 Posts |
@spruett001, in the third pic the 1998 S is the coin on top and the 2001 D is on the bottom. The 2001d is the coin on the right and the normal 2001d ison the left.
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Pillar of the Community
United States
5239 Posts |
I want to thank you all for taking your time and giving me some insight as to what may have caused this cent to be in the first place. @fortcollins, the information you gave me is priceless and I agree with you in that I've seen and have wide rimmed cents but nothing on this scale. I do have a question, who supplied the proof planchet sheets to San Francisco that same year?
Edited by Jim0815
04/06/2018 08:51 am
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Pillar of the Community
United States
3655 Posts |
Jim0815, sorry, I don't know who (if anybody) supplies cent planchets to San Francisco. Also, coop is spot on about the squared rims during this era.
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Bedrock of the Community
United States
62064 Posts |
I'm guessing the proof planchets are probably from the same source. But I've not read any information on that fact yet.
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Pillar of the Community
United States
5239 Posts |
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Replies: 10 / Views: 2,618 |
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Posted 04/05/2018 11:49 pm
