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Zincolns - Why Is My Coin All Scratched Up?

 
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Author Previous TopicReplies: 13 / Views: 291Next Topic  
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 Posted 01/26/2021  7:12 pm Show Profile   Check BadThad's eBay Listings Bookmark this topic Add BadThad to your friends list Get a Link to this Message
Some copper plated zinc Lincolns (Zincolns) were recently posted in the grading section. A few people incorrectly identified the "scratches" on the surface as PMD. I thought it best to explain why those are common on Zincolns in this section so everyone can discuss.

Most prevalent in the 1990's, scratchy surfaces (SS) are quite common. Nearly every coin has at least traces of this minting effect. Even the highest grade coins (67+) normally show traces of SS somewhere on the coin.

Here's an example of SS. Across all of the surfaces you can see lines. SS are strong in the area at the bottom of the bust. You can also see it in the other high points, hair around the top of the head and cheek.





Why does this happen?

As I recall, around 1990 the mint switched to new, faster, horizontal presses to speed production - they were learning and experimenting while running. This resulted in mostly sub-perfect coins.

To extend die life, they try to use the lowest die pressure they could. The result is the coins do not fully strike up and artifacts on the planchet do not get properly smoothed out.

Since these are very thinly copper plated coins, the metal stretches differently from other types of coins. Add to the fact you pressing two dissimilar metals and the minting challenges go up a couple more notches.

Lastly, the planchets supplied to the mint have obvious lines in them. An artifact of the massive roller machines used to press the planchet sheets. These lines have been discussed by me MANY times in the past on the forum (and other forums).

This Greaser coin, with a SUPER weak strike clearly shows the lines. These are supposed to smooth out under striking pressure but you can see just how course they are on a weak coin.



Combine all the above and you have the reasons for SS on Zincolns. It's an artifact from the strike and the planchets used and completely normal.
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 Posted 01/26/2021  7:15 pm  Show Profile   Bookmark this reply Add Coinfrog to your friends list Get a Link to this Reply
These are characteristic linear plating issues frequently seen on Zincolns. Not scratches or roller lines.
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 Posted 01/26/2021  7:16 pm  Show Profile   Check BadThad's eBay Listings Bookmark this reply Add BadThad to your friends list Get a Link to this Reply
This error coin also shows the lines in the unstruck planchet area. They are very fine in this example but they are there. This coin is terrific for my topic because you can also see SS along the rim in the struck part.


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 Posted 01/26/2021  7:19 pm  Show Profile   Check BadThad's eBay Listings Bookmark this reply Add BadThad to your friends list Get a Link to this Reply
Another example of lines in a planchet.


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 Posted 01/26/2021  8:30 pm  Show Profile   Bookmark this reply Add Spence to your friends list Get a Link to this Reply
Interesting thread @bt--thx for posting. I'm going to move it to the variety and error subforum though so that it gets more eyes on it.
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 Posted 01/26/2021  8:41 pm  Show Profile   Bookmark this reply Add oriole to your friends list Get a Link to this Reply
Cheap coins that are cheaply made. It all makes perfect sense.
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 Posted 01/26/2021  8:50 pm  Show Profile   Bookmark this reply Add ijn1944 to your friends list Get a Link to this Reply
All said and done, I do like the toning on that one example.
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 Posted 01/26/2021  11:28 pm  Show Profile   Check BadThad's eBay Listings Bookmark this reply Add BadThad to your friends list Get a Link to this Reply

Quote:
All said and done, I do like the toning on that one example.


A grungy circulation find...but it's awesome.



Lincoln Cent Lover!
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 Posted 01/26/2021  11:33 pm  Show Profile   Check BadThad's eBay Listings Bookmark this reply Add BadThad to your friends list Get a Link to this Reply
Capped die shows the planchet striations well.

Lincoln Cent Lover!
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 Posted 01/26/2021  11:37 pm  Show Profile   Check BadThad's eBay Listings Bookmark this reply Add BadThad to your friends list Get a Link to this Reply
Striations on all the high points, a normal part of the minting process. The stretching of the metal amplifies the planchet lines.

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Edited by BadThad
01/26/2021 11:39 pm
Bedrock of the Community
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 Posted 01/26/2021  11:41 pm  Show Profile   Check BadThad's eBay Listings Bookmark this reply Add BadThad to your friends list Get a Link to this Reply
Planchet lines very apparent.


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 Posted 01/26/2021  11:43 pm  Show Profile   Check BadThad's eBay Listings Bookmark this reply Add BadThad to your friends list Get a Link to this Reply
1991D


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 Posted 01/26/2021  11:49 pm  Show Profile   Check BadThad's eBay Listings Bookmark this reply Add BadThad to your friends list Get a Link to this Reply
The area where the bust meets the rim is "as struck" and not PMD.


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 Posted 01/27/2021  1:28 pm  Show Profile   Bookmark this reply Add coop to your friends list Get a Link to this Reply
Your coin is reaching the lost BU look, and now showing the roller lines. Eventually they will wear off the coin on the tops of the devices first, then the fields and other lower areas. But they are seen on the planchet before the strike:

Note you can see them on the un-struck area and also after the strike, but weakened a bit.
Richard S. Cooper
Some have asked about my images I use and I'm glad to say, you can now you can see the DVD in sections on youtube:
1. Intro, older coins, toned coins 2. Doubled dies 3. Die events, One of a kind errors 4. So called errors, Coin information 5. Coin information Types and Varieties, Overlays
Jefferson nickel doubled dies Wexler/Rebar complete listings

trail dies:http://www.traildies.com/
Edited by coop
01/27/2021 2:06 pm
  Previous TopicReplies: 13 / Views: 291Next Topic  
 
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