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1979 Quarter - Copper Obverse Missing Clad Layer - Bonding Error

 
 
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 Posted 10/14/2019  9:37 pm Show Profile   Check Yokozuna's eBay Listings Bookmark this topic Add Yokozuna to your friends list Get a Link to this Message
A nice example of a bonding error. One clad layer on the planchet separated before it was struck. This coin happened to have the copper layer exposed on the obverse when struck. The coin weighs 4.67 grams, or about 85% of a normal quarter's weight of 5.67 grams. The details of the coin are weak on both sides due to the missing metal mass in the coining chamber.

The definition of this error from Error-Ref.com

Quote:
One clad strip was not properly bonded to the core strip by the bonding mill. This caused the clad layer to separate from the copper core after blanking but before the coin was struck.


I also have a 1999-P Dime with the same error.



"Shine, shine, a Roosevelt dime
All the way to Baltimore and running out of time" - Tom Waits 'Clap Hands'

Edited by Yokozuna
10/14/2019 9:38 pm
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 Posted 10/14/2019  10:03 pm  Show Profile   Bookmark this reply Add Greasy Fingers to your friends list Get a Link to this Reply
For my education could you show me a shot of the edge (redding) obverse side up? Ple ASE
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 Posted 10/14/2019  10:19 pm  Show Profile   Bookmark this reply Add fortcollins to your friends list Get a Link to this Reply
Great coin! The strike looks pretty good for a significantly underweight planchet. Your coin has nice eye appeal.
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 Posted 10/14/2019  11:28 pm  Show Profile   Check Yokozuna's eBay Listings Bookmark this reply Add Yokozuna to your friends list Get a Link to this Reply
Here's a shot of the edge. It's almost all copper with only a little of the clad layer showing.
"Shine, shine, a Roosevelt dime
All the way to Baltimore and running out of time" - Tom Waits 'Clap Hands'

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 Posted 10/14/2019  11:35 pm  Show Profile   Bookmark this reply Add Greasy Fingers to your friends list Get a Link to this Reply
Very nice...Thank you
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 Posted 10/15/2019  01:00 am  Show Profile   Bookmark this reply Add coop to your friends list Get a Link to this Reply
What does the edge tell me? That the stock material was cut with the obverse side up (the side with the missing cladding) How do I know this? The copper color is longer from the top. If it had been cut from the opposite side, the silver color on the edge would show a longer silver color. Note on these quarters:

The longer gray edge is cut from that top/bottom of the planchet. Thinner gray color is the bottom of the cut.
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/
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 Posted 10/15/2019  01:05 am  Show Profile   Check Yokozuna's eBay Listings Bookmark this reply Add Yokozuna to your friends list Get a Link to this Reply
I see what you mean. Thanks Coop!
"Shine, shine, a Roosevelt dime
All the way to Baltimore and running out of time" - Tom Waits 'Clap Hands'

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 Posted 10/15/2019  1:41 pm  Show Profile   Bookmark this reply Add Conder101 to your friends list Get a Link to this Reply

Quote:
Here's a shot of the edge. It's almost all copper with only a little of the clad layer showing.

What it tells me is that the clad layer that came off was the layer on the bottom side of the strip as it went through the blanking press. And as Coop points out that side was facing the obv die when it was struck.
Gary Schmidt
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