Strange 2008 Lincoln - Coin Community Forum

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Author	Replies: 7 / Views: 859
trdhrdr007 Pillar of the Community United States 2335 Posts	Posted 08/23/2008 4:13 pm It's been pouring down rain here all day so I thought I'd go through the change I collected this week. Nothing interesting except for this 2008 Lincoln Cent. These are the best pictures I could come up with, so please bear with me. I'm definitely NOT an expert of Lincoln's, but have never seen anything that looked like this before. It looks to me like the die was heavily polished. This is most evident on Lincolns hair & at the base of the bust. The hair is flat in places, & the VD of VDB is gone. On the reverse it looks like the D in UNITED & S in States are about half gone. Although the photos don't show it clearly, there are obvious parallel lines running through the fields surrounding the affected areas. What do ya'll think? Report this Post to the Staff

mikediamond Pillar of the Community United States 2736 Posts	Posted 08/23/2008 4:35 pm The effect you see is extremely common. It's caused by an accumulation of oil or grease in the recesses of the die. The oil has no texture of its own but instead preserves the original streaky texture of the unstruck planchet. Error coin writer and researcher. Report this Post to the Staff
MorgansRmine Pillar of the Community United States 1219 Posts	Posted 08/23/2008 5:34 pm Thanks Mike, I've seen plenty of these and always assumed they just got stuck on a conveyor belt for a peroid of time before being knocked loose and continueing on there way. I guess because the stirations look like wear lines. Report this Post to the Staff
trdhrdr007 Pillar of the Community United States 2335 Posts	Posted 08/23/2008 5:43 pm I've seen plenty of Grease Filled Dies before & know they are common. I guess I never looked closely enough at one to notice the texture around the missing design elements. Thinking about the process I can't come up with any way that polishing or filing the die could cause what I'm seeing without affecting more of the coin. Am I correct in assuming that a blank planchet would show a texture of parallel lines under magnification? Report this Post to the Staff
mikediamond Pillar of the Community United States 2736 Posts	Posted 08/23/2008 6:43 pm If you find an off-center strike in which the die-struck portion was struck through "grease", then you'll see absolute continuity between the streaks on the unstruck part of the planchet and the streaks in the grease-struck areas. Error coin writer and researcher. Report this Post to the Staff
rockdude Pillar of the Community United States 1807 Posts	Posted 08/23/2008 7:48 pm trdhrdr007; I posted a coin with the same marks and what looked like some grease still there and I was told that someone torched it, but I had the coin in hand and knew better. GREASE. What do you think? a 2002 close up Edited by rockdude 08/23/2008 7:49 pm Report this Post to the Staff
trdhrdr007 Pillar of the Community United States 2335 Posts	Posted 08/24/2008 10:27 am rockdude... your picture shows the "texture" that I was unable to & the hair looks very close to mine so I vote grease. Lots of good information available here, which is one of the reasons I keep coming back. Report this Post to the Staff
coindexter Pillar of the Community United States 869 Posts	Posted 08/24/2008 9:48 pm ROCKDUDE it looks like zinc corrosion I see quite a few of them. I have also seen them corrode from the inside out also. You will see small bubbles form under the copper plating. Report this Post to the Staff
	Replies: 7 / Views: 859

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