1999 Lincoln Memorial Cent / LMC Rim Question

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Author	Replies: 4 / Views: 1,226
jdavis18 Pillar of the Community United States 555 Posts	Posted 08/04/2011 9:55 pm I was just looking at a 1999 LMC and on left side of the obverse there seems to be an extra indented rim. Although the pictures below are a poor quality, it is the best I can do right now. I am working on getting better equipment. Can someone tell me how this happened? Is it PMD or something else? Thanks Report this Post to the Staff

GTALLEN Valued Member United States 315 Posts	Posted 08/04/2011 11:47 pm I think in the interrupting process a coin edge can develop what appears to be "railroad tracks" along the edge. It seems fairly common in modern one cent coins. It maybe the high speed at which the process is run. Also the softer alloys maybe the cause. I went on a tour a long time ago of the Denver mint and saw how fast coins were minted. I also saw on the History channel the process of minting and the interrupting machine that makes the rim. It runs so fast that it is a blur. This is mostly speculation on my part, with a slight amount of seeing the process and how it could occur. I am sure someone, who is more familiar with that type of error, can elaborate more on the process that causes it to happen. Report this Post to the Staff
John1 Moderator United States 56855 Posts	Posted 08/05/2011 06:50 am It's not an error. The rim is made in an up-setting process not an interrupting machine and it's not a railroad rim. I am no pro but I think it's just a very minor MAD. IMHO, John1 P.S. I'm wrong as much as I'm right Report this Post to the Staff
GTALLEN Valued Member United States 315 Posts	Posted 08/05/2011 10:54 pm Thanks John for the correct terminology, up-setting process. What does "MAD" stand for? Also, what does a "railroad" rim look like? Because what I thought it looked like was like the top picture that was posted. Report this Post to the Staff
biokemist6 Bedrock of the Community United States 12437 Posts	Posted 08/06/2011 01:48 am MAD= misaligned die. A parallel partial collar error, aka "railroad rim", affects the edge of the coin parallel to the coin itself. I do not own a railroad rim but I do have several tilted partial collar errors. On this half dollar, you can clearly see the interruption in the reeding with the affected area extending beyond the normal diameter of the coin. Report this Post to the Staff
	Replies: 4 / Views: 1,226

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1999 LMC Rim Question