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 Replies: 19 / Views: 11,159 |
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Pillar of the Community
United States
5211 Posts |
I have a 1971D Kennedy half I found roll hunting that weighs 8.8g - 8.9g depending on how the wind blows. The coin does unfortunately have roller damage to the outer circumference. I have found a few other Kennedy halves that are under weight but usually come in at 10.2g - 10.4g and one overweight at 11.9g. Usually they have a distinctive sound to them which causes me to set them aside and weigh them later. All of the Magicians halves I have found weight in at 10.4 and have a hollow thud to them. So was the US mint striking any other coins at the Denver mint in 1971 using a thinner and lighter planchet or what type of planchet flaw would cause such a weight and thickness difference?      |
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Rest in Peace
United States
1943 Posts |
Looks like you found a wrong stock error struck on quarter stock. This is different than a wrong planchet error. With a wrong planchet error the half would weigh the same as a quarter and be smaller in size. But with your coin the error happened because coil stock rolled to quarter stock thickness was use to punch out half dollar blanks. Nice find!
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Pillar of the Community
 United States
5211 Posts |
I think you are right about rolled to the wrong thickness planchet. I just went rummaging through my box of off weight halves and found another one. I wonder if sending them in to a TPG together would throw up a red flag as to their authenticity or add credence to their authenticity? I wonder what the slab would say? Just underweight or a detailed explanation like quarter stock?       |
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Rest in Peace
United States
1943 Posts |
I would think if you send it in requesting the error attribution of struck on quarter stock you should get it.
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Pillar of the Community
United States
5211 Posts |
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Rest in Peace
United States
1943 Posts |
I have a 1969 D dime I found from circulation struck on quarter stock. It seems the Denver mint created several of this type of error in the late 60's to early 70's. The Official Coneca Handbook has a page listing the weights of the possible wrong stock errors. I have referred to this page several times in the past.
Edited by pyrbob
12/21/2013 10:04 pm
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Pillar of the Community
United States
5211 Posts |
Any idea as to the value and rarity of mine?
Edited by jack jeckel
12/21/2013 10:12 pm
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Rest in Peace
United States
1943 Posts |
I really don't know. The popular 1970 D quarter struck on dime stock typically brings $20 up. I would guess this half would bring more than the quarter.
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Bedrock of the Community
Australia
21788 Posts |
The coin appears to be lightly struck.
That is due to the thin blank.
Interesting error.
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Pillar of the Community
United States
5211 Posts |
Quote:
The Official Coneca Handbook has a page listing the weights of the possible wrong stock errors Does the book show a half with a weight of 11.8g?   Edited by jack jeckel
12/22/2013 4:41 pm
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Rest in Peace
United States
1943 Posts |
The weights are actually listed in grains and have to be converted if weighed in grams but no. It is probably a slightly thick planchet.
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Pillar of the Community
United States
901 Posts |
Ahhh now we're dong half's did you change the roller stock?  I knew I forgot something  |
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Pillar of the Community
United States
5211 Posts |
Got these back today from ANACS from their insider special free grading. Thank you ANACS   |
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Rest in Peace
United States
1943 Posts |
Very Nice! |
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Pillar of the Community
United States
1300 Posts |
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Bedrock of the Community
United States
12437 Posts |
Now you need a companion, specifically a quarter struck on dime stock  They are known for several years in the late 60s/early 70s and would be a bit more common than your half dollars. |
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Replies: 19 / Views: 11,159 |
Posted 12/21/2013 9:23 pm
