Tolerance - Coin Community Forum

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Author	Replies: 7 / Views: 2,087
nevawind New Member China 7 Posts	Posted 11/02/2012 02:50 am Hello everyone. I purchased some 40% silver Kennedy half dollars (1965 - 1969) last week and now have a question. The standard weight of 40% Kennedy half dollar is 11.5g according to the Krause Catalog, but the real weight of them are from 11.21g to 11.55g . Anyone can tell me is it within the tolerance or not? And where can I find the reference book or material about the tolerance of silver coins (US or World)? Thanks. Report this Post to the Staff

TenHalves Valued Member United States 61 Posts	Posted 11/02/2012 09:12 am I don't know if this is factual or not, but I thought I read or heard on a tour at the Philadelphia mint that +/- 2% was their standard tolerance on coin weight or else they are automatically rejected by their equipment. Typically I find when I weigh silver coins though that they are generally right on where they are supposed to be unless heavily circulated or otherwise damaged. Report this Post to the Staff
tomtom777 Valued Member United States 243 Posts	Posted 11/02/2012 11:36 am I don't know about the 40% coins but when I weigh mine they are also pretty much right on the weight. Report this Post to the Staff
D0ubl3Eagle Pillar of the Community United States 5854 Posts	Posted 11/02/2012 12:06 pm There is a table in Counterfeit Detection: A Reprint From The Numismatist, Volume II that has these numbers. The tolerance is 0.4g. Keep in mind that worn coins may be at the low end or a bit outside of tolerances. Report this Post to the Staff
mds308 Pillar of the Community United States 1721 Posts	Posted 11/02/2012 1:02 pm Don't forget about metal loss from wear during circulation. If your scale is accurate and can weigh down to 100th of a gram (like you stated) then I'm sure you'll find normal discrepancies. Report this Post to the Staff
Conder101 Bedrock of the Community United States 17884 Posts	Posted 11/05/2012 5:11 pm Doubleagle is correct on the tolerance for the 40% silver halves +/- .4 grams. There is a table for the tolerances of all US coins in the Coin World Almanac and that is where I get my figures from. I haven't checked but the tolerance tables might be found in some of the older issues of the annual mint report back when they used to have a lot more technical information in them. Edited by Conder101 11/05/2012 5:14 pm Report this Post to the Staff
BadToTheBone Pillar of the Community United States 1795 Posts	Posted 11/06/2012 09:40 am I agree unless widely circulated and worn the coins usually are right on with the weight. Report this Post to the Staff
nevawind New Member China 7 Posts	Posted 11/07/2012 12:01 am Yes, I got it , Thank you all :) Edited by nevawind 11/07/2012 12:17 am Report this Post to the Staff
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