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<p>[QUOTE=&quot;GDJMSP, post: 1260029, member: 112&quot;]I can&#039;t give you a definitive answer because I don&#039;t think anyone knows. </p><p><br /></p><p>There were 2 methods employed by the various mints around the world to produce the cameo effect on the devices of Proof coins - sandblasting and acid etching. Sandblasting was invented in 1870, so coins dated before that were obviously etched by acid. But after that, the mints were switching back and forth from time to time basically on the whim of whoever was in charge at the time.</p><p><br /></p><p>Polishing was the universal method of producing the mirrored or mirror like fields.[/QUOTE]</p><p><br /></p>

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