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<p>[QUOTE=&quot;Kentucky, post: 8301964, member: 33176&quot;]As to the &quot;All metals, especially precious metals, and most scientific weights, are measured using Troy Ounces.&quot; The answer is no.&nbsp; Precious metals are measured using Troy ounces.&nbsp; I was admonished when I posted that a British Cartwheel (1797 British Two Pence) weighed 62 grams...it doesn&#039;t.&nbsp; Copper is weighed by the Avoirdupois ounce, and a Cartwheel weighs 57 grams.</p><p><br /></p><p>As to the US being the &quot;only&quot; country not to use the Metric system (MKS or CGS) system, yes and no.&nbsp; The US is officially on the Metric system (the definition of an inch is 2.54 cm), but the Av system is still in popular use.[/QUOTE]</p><p><br /></p>

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