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 Replies: 9 / Views: 4,481 |
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Valued Member
Canada
91 Posts |
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Pillar of the Community
 United States
4618 Posts |
Do you have the weight of the coin? The weight should tell you if it's 90% silver or 40% silver. A 90% silver Kennedy should weigh 12.5 grams and the 40% should be 1 gram less at 11.5 grams.
ANA ID: 3203813 - CONECA ID: N-5637 Clean a coin that may be worth collecting? Please DON'T! When in doubt, leave it dirty!! 
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Pillar of the Community
United States
4680 Posts |
 there's a big enough gap in weight between the two to help give a pretty definitive answer. |
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Valued Member
United States
324 Posts |
In your edge picture, which one is the 1965?
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Pillar of the Community
 United States
2843 Posts |
weight is needed here. Edge is not a reliable way to determine 90 vs 40. I've seen plenty of very clean white edges on 40%ers |
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Bedrock of the Community
United States
19173 Posts |
Yes, I've seen white edges on many, many 40% Kennedy halves. Eager to learn the weight. |
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Valued Member
 Canada
91 Posts |
Both the coins are 1965, the weight is an issue I thought of too it comes up at 11.4 for dry weight and 1.1 for wet weight which gives 10.3 which is Shy of the 90% silver specific gravity weight of 10.5
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Valued Member
Canada
91 Posts |
It might be like the 1971-d 40% silver planchet error that was 11.3 g which is the normal weight for copper clad
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Moderator
United States
54282 Posts |
If it weighs 11.4 grams, then it is not 90% silver.
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Pillar of the Community
United States
1667 Posts |
No idea what you are doing or why, the coin weighs 11.4g right?
40%er is 11.500g with a tolerance of +/- 0.400 grams
90%er is 12.500g with a tolerance of +/- 0.259g
clad is 11.340g with a tolerance of +/- 0.454g
1. what are you trying to prove, that it's a 90% 1965? it's underweight by more than a gram if it is and the 90% had the tightest tolerances.
2. if it's 40%,it's only 0.1g light and could be circulation wear, couldn't it be a little lighter than that even and then it was plated with silver or another metal, maybe platinum even to explain the color? People plate everything and have for years now.
My opinion, it's been plated. and this is also what's throwing off youf SG readings for the additional plating you aren't accounting for.
Edited by Big-Kingdom
10/08/2020 2:24 pm
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Replies: 9 / Views: 4,481 |
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Posted 10/08/2020 09:00 am
