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1968-D US Kennedy Half Dollar Error Planchet!

 
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Author Previous TopicReplies: 5 / Views: 307Next Topic  
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Australia
104 Posts
 Posted 06/22/2021  06:29 am Show Profile   Bookmark this topic Add Habib Alimohamma to your friends list Get a Link to this Message
Hi,
I came across a 1968-D US Kennedy half dollar which should be %40 silver with 11.5g in weight.
This coin has 11.29g weight, so I decided to analyse its composition, and I found that this coin is made up with 79.34 percent silver and the rest is copper!!!
With this % of silver it's weight should be around 12.5g, but it's weight is about vopper- nickle one!!!
May I have your suggestions?
With regards,
Habib.





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United States
3087 Posts
 Posted 06/22/2021  06:47 am  Show Profile   Check Yokozuna's eBay Listings Bookmark this reply Add Yokozuna to your friends list Get a Link to this Reply
Forty Percent Silver Kennedy half dollars are composed of two outer layers containing 80% silver and 20% copper with an inner core of 20.9% silver and 79.1% copper (net composition: 40% silver and 60% copper).

The device is only reading the top most layer of the coin. It cannot read through to the core, so it looks as if it's giving the correct and normal reading.
"Shine, shine a Roosevelt dime. All the way to Baltimore and runnin' out of time." Tom Waits-Clap Hands



Edited by Yokozuna
06/22/2021 06:49 am
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United States
40082 Posts
 Posted 06/22/2021  06:59 am  Show Profile   Bookmark this reply Add John1 to your friends list Get a Link to this Reply
.26 grams +/- is mint tolerance.
John1
( I'm no pro, it's just my humble opinion )
Searched 6.5 +/- Million Cents Since 1971
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United States
4761 Posts
 Posted 06/22/2021  08:06 am  Show Profile   Bookmark this reply Add ijn1944 to your friends list Get a Link to this Reply
Agree with 'zuna.
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 Posted 06/22/2021  08:47 am  Show Profile   Bookmark this reply Add Coinfrog to your friends list Get a Link to this Reply
Agree, device is reading the outer layer on a normal coin.
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 Posted 06/22/2021  11:57 am  Show Profile   Bookmark this reply Add Oldfordman to your friends list Get a Link to this Reply
It is the usual one.
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