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<p>[QUOTE=&quot;AWORDCREATED, post: 1733578, member: 52245&quot;]I am sure you have better sources than me.&nbsp; Can you point me to a net site for tolerances?&nbsp; My old redbook, 48th ed states clad quarters weigh 5.67 grams, drop 2 of them in there and you get 11.34.&nbsp; Thanks for making me look that up, turns out real close to my coin.&nbsp; Far as I know the density of Cu is 8.940 and Ni 8.908&nbsp; coinflation puts the mix at 0.901675 Ni over all and factmonster puts it at 0.91670, either way that comes to 8.91 clad coin density.&nbsp; what is the actual overall composition of clad coins?&nbsp; Let me guess that varies also <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie1" alt=":)" unselectable="on" unselectable="on" />&nbsp; Similarly if Ag is 10.490 a 40% coin with Cu is 9.560 over all coin SG.&nbsp; If the tolerances you claim are real, then weight alone is not the key, which is why I mentioned using a Jolly up there ^.&nbsp; I tried to rig up a jolly on a triple beam today and come up with 8.9715 on this coin and almost exactly that on an 83 half.&nbsp; I tried a 1.541 gram of Cu wire as a check and came up a tad high, 9.1183 before temp correction.&nbsp; 17C.&nbsp; So if the coin was a light version of the right mix and the mix was skewed toward Cu, I have a cheaply made coin.&nbsp; I need a reference to tolerances to limit the possibilities, mathematically.&nbsp; And probably a better Jolly.&nbsp; A worn 1966 silver came back at 9.302, which makes sense since it is the silver that wears not the core.[/QUOTE]</p><p><br /></p>

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