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1994-D Lincoln - Missing Copper Layer? Or PMD?

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cwb1877's Avatar
United States
1659 Posts
 Posted 12/04/2011  12:44 am Show Profile   Bookmark this topic Add cwb1877 to your friends list Get a Link to this Message Number of Subscribers
Found this one out of a bank roll. I'm not sure what to make of it. It appears to be missing part of the copper layer. I'm not sure if it's a legitimate error, or simply PMD.

The zinc areas are fairly lustrous when viewed at an angle, though a little duller than the surrounding copper.

What do you think?

Thanks!


1994-D-Lincoln---Missing-Copper-Layer?-Or-PMD?
1994-D-Lincoln---Missing-Copper-Layer?-Or-PMD?
Edited by cwb1877
12/04/2011 12:50 am
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biggfredd's Avatar
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9104 Posts
 Posted 12/04/2011  11:43 am  Show Profile   Bookmark this reply Add biggfredd to your friends list Get a Link to this Reply
With as much other circulation as is evident, I'd vote PMD.
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BadThad's Avatar
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19973 Posts
 Posted 12/04/2011  3:27 pm  Show Profile   Bookmark this reply Add BadThad to your friends list Get a Link to this Reply
PMD, there's have to be luster in that area to be an error.
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cwb1877's Avatar
United States
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 Posted 12/04/2011  4:24 pm  Show Profile   Bookmark this reply Add cwb1877 to your friends list Get a Link to this Reply

Quote:
PMD, there's have to be luster in that area to be an error.


It does show luster in that area. It's better seen at an angle. It has cartwheel luster, it's just not as bright as the copper areas. Here's another pic of the obverse.

The pessimist in me wants to dismiss it as PMD, but I just can't bring myself to throw it in the junk bin quite yet.

What do you think with the new pic?


1994-D-Lincoln---Missing-Copper-Layer?-Or-PMD?
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biggfredd's Avatar
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 Posted 12/04/2011  10:40 pm  Show Profile   Bookmark this reply Add biggfredd to your friends list Get a Link to this Reply
Looks like it could have gotten too light a plating.
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cwb1877's Avatar
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1659 Posts
 Posted 12/10/2011  7:34 pm  Show Profile   Bookmark this reply Add cwb1877 to your friends list Get a Link to this Reply
I'm thinking that's a possibility.

It's got me stumped. I would hate to dismiss it just yet and have it turn out to be a legit error.

Any other ideas out there?
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 Posted 12/11/2011  2:09 pm  Show Profile   Bookmark this reply Add mikediamond to your friends list Get a Link to this Reply
It could be a cent struck on a partly plated planchet. However, these errors usually show an abrupt boundary between the copper and zinc areas. If the boundary is soft, it's usually marked by a transitional zone that has a black color. Still, these sorts of errors are highly variable in appearance, so I can't rule out this diagnosis. A close inspection under a microscope would be necessary to establish the authenticity of this error.

One troubling sign is that a copper-colored D-mintmark sits within the zinc-colored zone. Since the strike comes last, you'd expect the D-mintmark also to be fully zinc-colored.
Error coin writer and researcher.
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Lobby's Avatar
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548 Posts
 Posted 12/11/2011  3:23 pm  Show Profile   Bookmark this reply Add Lobby to your friends list Get a Link to this Reply
It looks like someone dropped some acid on it: vinegar, lemon juice, heck, even muriatic. Who knows?
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cwb1877's Avatar
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 Posted 12/11/2011  6:03 pm  Show Profile   Bookmark this reply Add cwb1877 to your friends list Get a Link to this Reply
Thanks for the input!


Quote:
A close inspection under a microscope would be necessary to establish the authenticity of this error.


Do you do microscopic inspections? If not, do you have any recommendations on who to send it to?

Also, is it worth investigating further? In other words, I don't really want to spend $40 on postage, fees, etc. on a coin that is worth $10 if authentic. I have no idea what it could be worth if authentic, I just used these numbers for example.

Thanks again!
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 Posted 12/12/2011  11:22 am  Show Profile   Bookmark this reply Add mikediamond to your friends list Get a Link to this Reply
I can inspect it, if you like. I charge a modest fee of $5 per coin, although I sometimes waive it if a coin is of particular interest to me. If you're interested in sending it to me, contact me at mdia1@aol.com. -- Mike
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 Posted 12/17/2011  10:49 am  Show Profile   Bookmark this reply Add mikediamond to your friends list Get a Link to this Reply
I've studied the coin closely under a microscope and have concluded that it's a genuine, and rather unusual, example of a cent struck on a partly plated planchet.

The zinc has oxidized but lacks the tiny bumps one associates on a cent whose copper plating has been chemically stripped. In some areas the zinc retains the original streaks of the unstruck, unplated planchet.

The copper plating is quite thin. The plating has split around almost all the peripheral design elements. This explains why the D-mintmark and certain peripheral letters have copper on their upper surface but are surrounded by exposed zinc. The zinc that was exposed around each letter during the strike merged with the larger zone of exposed zinc right next to it.
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Morgans Dad's Avatar
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 Posted 12/17/2011  10:56 am  Show Profile   Bookmark this reply Add Morgans Dad to your friends list Get a Link to this Reply
Leave it to an expert!! Congrats..
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Tunnioc's Avatar
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3185 Posts
 Posted 12/17/2011  11:08 am  Show Profile   Bookmark this reply Add Tunnioc to your friends list Get a Link to this Reply
Very cool

Good eyes on that find cwb8539
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yankee1227's Avatar
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1151 Posts
 Posted 12/17/2011  11:17 am  Show Profile   Bookmark this reply Add yankee1227 to your friends list Get a Link to this Reply
That't neat!

What does a coin like this usually gor for Mike?
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 Posted 12/17/2011  11:27 am  Show Profile   Bookmark this reply Add mikediamond to your friends list Get a Link to this Reply
Maybe 30 bucks on a good day. However, prices on ebay tend to be highly variable. Sometimes they sell as low as $8 and other times over $30.
Error coin writer and researcher.
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yankee1227's Avatar
United States
1151 Posts
 Posted 12/17/2011  11:42 am  Show Profile   Bookmark this reply Add yankee1227 to your friends list Get a Link to this Reply
Cool Find! I emailed you.
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