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 Replies: 11 / Views: 617 |
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Valued Member
Japan
294 Posts |
Hey everyone. I purchased a red "Bicentennial Silver Uncirculated Set" recently, and I usually don't like to open them but I had to for this one because of the color on the Kennedy half. All of it's dimensions add up except for the weight, which is 11.9. The scale I use isn't top notch, but it's consistent with all the other coins I use it for, as well as the other silvers I'll put here for comparison. It wasn't tampered with because I pulled it directly out of the pack. I also gave it a quick acetone bath just to make sure something wasn't creeping on the surface, but no change. Does anyone have any ideas? What is the acceptable tolerance for an overweight 76-S Kennedy half? The pictures I'll add show the front, back, and sides, the weight, and comparisons with the other two silvers in the pack, two 90% silver medals, and a regular clad quarter (to the left). I also put them under tissue to show that the color does show brighter than a clad, but still tanner than the others:        |
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Moderator
 United States
34398 Posts |
"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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Valued Member
 Japan
294 Posts |
Spence, thank you very much! I'm definitely saving that chart.
However, it doesn't show tolerance related to any of the Bicentennial silvers. Did the US mint not release that data?
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Pillar of the Community
 United States
6495 Posts |
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Moderator
United States
95517 Posts |
agreed, it looks like it is about .4 grams over spec for a 40% silver half  |
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Moderator
United States
188187 Posts |
There is no reason to suspect they changed anything from what they were using just five years earlier. Probably had the coil stock in storage. So, from the link Spence posted... Standard 11.50, Range 11.10-11.90 This example is right at the top end. https://www.coincommunity.com/us_co...lerances.asp |
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Bedrock of the Community
Canada
21601 Posts |
If you are going to weigh coins, you will need a scale that is accurate to at least 2 decimal points.
Your coin could weigh 11.88g and be in spec even though the scale reads 11.9
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Valued Member
Japan
294 Posts |
Yes, it's most likely a coin at the upper echelon of Weight Tolerance, which wouldn't affect the value much. But I think I'll hold on to it just in case. I wonder if the color being like that and the weight are related somehow, so I'll see if I can find any more. |
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Valued Member
Japan
294 Posts |
JimmyD you're absolutely right. I'll have to invest in something a little more reliable for a case like this.
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Valued Member
Japan
294 Posts |
Jbuck- I think that's a very logical conclusion. For me personally, it seems like the planchets the planchets that were used, despite having the same percentage of silver and cooper, were not "put together" in the same way. Don't know how to put my finger on it, but they just feel/look different (not only in the design).
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Pillar of the Community
United States
1780 Posts |
...for 26 bucks, this little scale is surprisingly accurate ... search: Kubie scale ... I check mine from time-2-time against my LCS expensive scale, & the comparison averages < .002 > ... I've used it for weighing coins daily for about 2 years & has held up well ... last "check-up" was a few days ago ...
...it is very sensitive, & I do have to 'calibrate / tare' mine daily with the included 100g weight ...
...runs portable off 2 AAA batteries, or plugs into a USB ...
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Moderator
United States
188187 Posts |
Quote:
Don't know how to put my finger on it, but they just feel/look different (not only in the design). It could be that these were minted specifically to be in OGP sets, where the others were minted to be circulated. Standards are different for set-bound coins today (minted at slower speeds with higher pressure and handled better after the strike), so I would not be surprised if a little extra care were given to these sine they were "special" coins then. |
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Replies: 11 / Views: 617 |
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Posted 11/04/2025 08:58 am
