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<p>[QUOTE=&quot;physics-fan3.14, post: 2346681, member: 19165&quot;]A modern proof will be struck twice at higher pressures with special presses on specially prepared planchets with dedicated dies. </p><p><br /></p><p>If any of these factors are not present, the coin is a &quot;business strike&quot; and will be designated as PL. There are numerous Canadian, British, Chinese, Mexican, South African, and other coins which have a proof appearance but which aren&#039;t true proofs. These will all be designated as &quot;PL&quot;. Do a quick search on Ebay and this will become immediately apparent.[/QUOTE]</p><p><br /></p>

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