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1974 D Kennedy Half Dollar - Does Envirmental Damage Effect Weight?

 
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 Posted 11/20/2018  4:23 pm Show Profile   Bookmark this topic Add JKeyes to your friends list Get a Link to this Message
Hello I was looking through a box of half dollars and this coin left me stumped on how weird the toning is long with the weight. Can anyone tell me what the deal is with this coin?



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 Posted 11/20/2018  4:27 pm  Show Profile   Bookmark this reply Add John1 to your friends list Get a Link to this Reply
It can if some of the metal has been eaten away. Your coins seems to be within mint tolerance.
John1
( I'm no pro, it's just my humble opinion )
Searched 5+ Million Cents Since 1971
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 Posted 11/20/2018  4:30 pm  Show Profile   Bookmark this reply Add JKeyes to your friends list Get a Link to this Reply
"Within mint tolerance" explain?
New Member
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 Posted 11/20/2018  5:40 pm  Show Profile   Bookmark this reply Add JKeyes to your friends list Get a Link to this Reply
I was also wondering what exactly is going on with this coin. Is it from outside damage, a wrong or missing planchet? The rim is the same tone as the coin all around.
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 Posted 11/20/2018  5:42 pm  Show Profile   Bookmark this reply Add John1 to your friends list Get a Link to this Reply
Each denomination has a +/- of a few grams eg a cent is .13 grams. I don't know what it would be for a half.
John1
( I'm no pro, it's just my humble opinion )
Searched 5+ Million Cents Since 1971
Bedrock of the Community
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33647 Posts
 Posted 11/20/2018  5:44 pm  Show Profile   Bookmark this reply Add John1 to your friends list Get a Link to this Reply
I think it is from out of doors damage, environmental damage from being buried.
John1
( I'm no pro, it's just my humble opinion )
Searched 5+ Million Cents Since 1971
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 Posted 11/20/2018  7:50 pm  Show Profile   Bookmark this reply Add Spence to your friends list Get a Link to this Reply

Quote:
Halves 4 grains +/- .26 grams


Compliments of @Halo1st:

http://goccf.com/t/280621

"If you climb a good tree, you get a push."
-----Ghanaian proverb

"The danger we all now face is distinguishing between what is authentic and what is performed."
-----King Adz

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2143 Posts
 Posted 11/20/2018  9:18 pm  Show Profile   Bookmark this reply Add Halo1st to your friends list Get a Link to this Reply
FYI, the reference I found, copied and pasted back then has some discrepancies or typos.

Later found the actual 2011 Coin World Almanac specs for Half Dollars to read as follows:

1971 to date (excluding bicentennial 40% silver clad)
Composition: 75 Cu. 25 Ni on pure Cu
Weight: 11.340 grams
Tolerance: +/- 0.454 grams

1976 (similar to 1965 - 1970 40% silver clad)
Composition: 40% silver clad
Weight: 11.500 grams
Tolerance: +/- 0.400 grams

Thanks, Doug.

PS: I'm debating removing that old reference pending the original authors advice. Some parts seem by the book while other parts I question.



Second opinions are always recommended. Rookies thoughts!
Two sides to every coin. The edge makes three.
Side Note: Sometimes I feel like a nut, sometimes I don't.
Edited by Halo1st
11/20/2018 9:54 pm
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 Posted 11/20/2018  9:31 pm  Show Profile   Bookmark this reply Add Spence to your friends list Get a Link to this Reply

Quote:
I'm debating removing that old reference


Ah sorry for promulgating incorrect numbers.
"If you climb a good tree, you get a push."
-----Ghanaian proverb

"The danger we all now face is distinguishing between what is authentic and what is performed."
-----King Adz

Bedrock of the Community
United States
16546 Posts
 Posted 11/21/2018  3:11 pm  Show Profile   Bookmark this reply Add Conder101 to your friends list Get a Link to this Reply
The numbers in the linked tread do have some typos, and they were in reference to specific coins listed in an even earlier thread. Since I can't change the typos it might be best to pull the reference. But I will once again offer to send anyone that wants it a PDF of the tolerances from the 2011 edition of the Coin World Almanac (No typos in it, it's from the book) Just drop me an email.
Gary Schmidt
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