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<p>[QUOTE=&quot;desertgem, post: 743209, member: 15199&quot;]The American Silver Eagle for sure has a prescribed minimum weight of 31.103 grams, but no variance (+/-) is allowed on the minimum side, but nothing is mentioned as far as a maximum. I suspect the Canadian is similar. So it looks like by allowing a .25+ gram allowance on the high side, it could eliminate weighing each ASE.</p><p><br /></p><p>The 90% US Silver Dollar was 26.73 grams with variance of +.097g to -.097, or a variance of .194 g possible( except for the 1964-D Peace tolerances was +0.39 to -0.39 grams or a .78gram variance ~ Breen).</p><p><br /></p><p>I suspect the Mexico coin was not a guaranteed weight coin, or it was within its variance ( which I don&#039;t have at hand).</p><p><br /></p><p>On balances, If you have any air movement when weighing on an open pan, just breathing over it can make a difference. Put a tupperwear container or something over it, especially if calibrating.</p><p><br /></p><p>Jim[/QUOTE]</p><p><br /></p>

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