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<p>[QUOTE=&quot;satootoko, post: 202152, member: 669&quot;]It would take someone with far more technical knowledge than I possess to fully answer your question. <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie11" alt=":rolleyes:" unselectable="on" unselectable="on" /></p><p><br /></p><p>The short answer is that modern coin operated machines are designed to distinguish between real and fake coins in part by their electrical conductivity, which varies according to the percentages of various metals in their makeup.&nbsp; Sacs worked without any changes in the machines because the alloys used were carefully designed to match the signature of the SBAs.&nbsp; How do they do it?&nbsp; Beats me. <img src="http://boards.collectors-society.com/images//graemlins/confused-smiley-013.gif" class="bbCodeImage wysiwygImage" alt="" unselectable="on" />[/QUOTE]</p><p><br /></p>

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