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2001 Kennedy Half With Convex Reverse

 
 
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8647 Posts
 Posted 06/04/2018  01:17 am Show Profile   Check SPP-Ottawa's eBay Listings Bookmark this topic Add SPP-Ottawa to your friends list Get a Link to this Message
This oddity came across my desk recently...

This is a mint state Kennedy half, and the dang thing is convex/concave. Reverse-side down, it will not sit flat on a table. There is no evidence of post-mint damage on the coin.

So, after a little digging, I found this:

http://www.numismaster.com/ta/numis...ticleId=7557

I think I have the same coin here as Ken Potter described in that 2009 article. Even the die cracks are the same. The die crack starts at the rim at L of HALF (DOLLAR) and runs counterclockwise all around the stars to T of UNITED.

A quick search on CCF showed almost nothing... is this a common error, or a desirable error? If so, what is something like this worth?

Hard to photograph a "gap" but this thing will not stack flat against another coin.


Die crack running around almost the whole coin, through the stars.



"Research is what I am doing, when I don't know what I am doing" --Wernher von Braun

Content of this post is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported License. See: http://creativecommons.org/licenses...0/deed.en_US

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United States
1856 Posts
 Posted 06/04/2018  04:24 am  Show Profile   Bookmark this reply Add ratman4762 to your friends list Get a Link to this Reply
I remember reading about those a few years ago. I can't imagine that they would be a common error.
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 Posted 06/04/2018  06:48 am  Show Profile   Check chafemasterj's eBay Listings Bookmark this reply Add chafemasterj to your friends list Get a Link to this Reply
The die crack where it's located makes sense with the convexity of the coin. The die cracks around the stars causing the center of the die to protrude, in turn causing the coin to be struck "cupped" like you found.

Really cool find!
Check out my counterstamped Lincoln Cent collection:
http://goccf.com/t/303507
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1386 Posts
 Posted 06/04/2018  07:01 am  Show Profile   Bookmark this reply Add Newbie234 to your friends list Get a Link to this Reply
Looks like it to me! Sweet find!
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 Posted 06/04/2018  09:53 am  Show Profile   Bookmark this reply Add moxking to your friends list Get a Link to this Reply
An excellent discovery and certainly well worth saving. Congratulations.
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 Posted 06/04/2018  09:55 am  Show Profile   Bookmark this reply Add SilverDollar2017 to your friends list Get a Link to this Reply
Nice find!
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 Posted 06/04/2018  09:55 am  Show Profile   Bookmark this reply Add Conder101 to your friends list Get a Link to this Reply

Quote:
The die cracks around the stars causing the center of the die to protrude, in turn causing the coin to be struck "cupped" like you found.

More likely the center of the reverse die is sinking making the die concave and the resulting coin slightly convex. Can't be sinking too much though, when that happens the strike in the center gets weak as well.
Gary Schmidt
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 Posted 06/04/2018  11:22 am  Show Profile   Check Errers and Varietys's eBay Listings Bookmark this reply Add Errers and Varietys to your friends list Get a Link to this Reply
Very nice find and congratulations! That's an awesome find
More information about Die Deterioration? http://goccf.com/t/317950
Retired U.S. Mint Coin Die Set information. http://goccf.com/t/302961
Machine Doubling Tutorial. http://goccf.com/t/332421
Die states progression on coins. Scroll down, so you can see the different die state progressions. http://goccf.com/t/325638
Die Deterioration Doubling Tutorial. http://goccf.com/t/336470
Split Plate Doubling Tutorial. http://goccf.com/t/357614
2000 P LMC With Retained Struck Through error. http://goccf.com/t/357080
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 Posted 06/04/2018  4:10 pm  Show Profile   Bookmark this reply Add coop to your friends list Get a Link to this Reply
Years ago they used to have a problem with the die cracks on the centers of coins.

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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