Silver 1971 Half Dollar? - Page 2 - Coin Community Forum

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Author	Replies: 32 / Views: 4,362	Page: of 3

SsuperDdave Moderator United States 23522 Posts	Posted 04/30/2015 07:55 am Quote: What if you factor in the weight,the mints Weight Tolerances? Copper clads have a Weight Tolerance of +/- 0.454g. 1964's have a tolerance of 0.259. All others have tolerance of 0.4g. This one by that measure is technically feasible for silver clad. Report this Post to the Staff
Jwmurders Valued Member United States 88 Posts	Posted 04/30/2015 09:56 am I started coin collecting just hunting for silver pre 64 s and 65-70 halfs and all I know is this one just screams silver when ya look at it, kind of like a silver clad proof is the best example I can relate it to. I am now trying to further my knowledge for errors and rarities. Edited by Jwmurders 04/30/2015 10:10 am Report this Post to the Staff
Cascade Pillar of the Community United States 7390 Posts	Posted 04/30/2015 10:13 am Send it to anacs under error service. Then you will know for sure... *I say anacs because you don't need a costly subscription to submit it Report this Post to the Staff
Jwmurders Valued Member United States 88 Posts	Posted 04/30/2015 10:43 am Yeah I plan on getting a few coins that would be worth submission set aside, just nice to get opinions from collectors that are far more knowledgable than myself, that is why I appreciate any and all information provided on the forum to discern said coin before money is spent and possibly wasted. Report this Post to the Staff
SsuperDdave Moderator United States 23522 Posts	Posted 04/30/2015 10:54 am I think an XRF analysis would solve this one instantly, but I have to wonder if anyone in your area would have an analyzer. Report this Post to the Staff
Jwmurders Valued Member United States 88 Posts	Posted 04/30/2015 11:04 am Is that the 15000 dollar metal testing machine? Report this Post to the Staff
koinpro Pillar of the Community United States 1781 Posts	Posted 04/30/2015 11:20 am The color is wrong it looks chromium plated. I have some like this in a paper weight. Report this Post to the Staff
Jwmurders Valued Member United States 88 Posts	Posted 04/30/2015 12:42 pm Quick update, dont know if it means anything or not. Went through my other kennedy halfs from 65-70, found only one 67 that weighs and scratches on the test stone in the same manner 11.2 grams rub the edge it shows silver in color and angle it they y both display copper. Now I only rubbed the one that weighd the same using a smooth black obsidian like test stone Report this Post to the Staff
Conder101 Bedrock of the Community United States 17884 Posts	Posted 04/30/2015 2:19 pm Quote: It's a gram and a half light to be pure silver, but closer to the earlier clad silver examples which ended a year earlier at 11.5g. Quote: The 1971 struck on a silver-clad planchet is a known error (in the Red Book), & quite a valuable one. The 1971 struck on a 40% silver planchet was a Denver issue. Philadelphia never struck 40% silver halves so there is nowhere for a 40% silver planchet to come from to make a 40% silver 1971. An XRF test might or might not tell you much, it depends on whether or not it could read through a plating layer. Although if it is plated the reading still wouldn't be right for a clad or a 40% half. A specific gravity test would also answer the question. The close weights for the coppernickel clad and the 40% silver, plus the wide mint tolerance, makes a determination by weight almost always inconclusive. Report this Post to the Staff
Jwmurders Valued Member United States 88 Posts	Posted 04/30/2015 4:27 pm Performed gravity testing to the best of my ability, I used a 1969 half, Franklin half and the 71 in question as well as a Troy oz 999 coin. Both Kennedy halfs come back within a tenth on my scale. Both show less than 40 pct silver as well as the Franklin which shows to be about 60 pct but the 999 round came back as 960ish I performed the tests several times on each coin. I may not be doing it in the best manner but with it coming in so close to the 69 test it has me still puzzled Report this Post to the Staff
Conder101 Bedrock of the Community United States 17884 Posts	Posted 05/01/2015 1:56 pm What values did you get with the test? Report this Post to the Staff
Jwmurders Valued Member United States 88 Posts	Posted 05/01/2015 4:43 pm I would have to perform it again to be exact but I know both Kennedy halfs tested at approximate 200-280 silver and the Franklin half showed 660 ish and try oz showed 967 ish Report this Post to the Staff
Conder101 Bedrock of the Community United States 17884 Posts	Posted 05/02/2015 09:47 am That would mean the Kennedy was around 9.3 the Franklin 10, and the troy oz around 10.4 The oz is pretty close but the other two are both way off. Report this Post to the Staff
Jwmurders Valued Member United States 88 Posts	Posted 05/02/2015 10:25 am Ya, kind of interesting I will have to get better distilled water and try it again Report this Post to the Staff
jimbucks Pillar of the Community United States 4692 Posts	Posted 05/02/2015 4:17 pm If sent to a TPG, would they test it if asked? Report this Post to the Staff
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